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Author SHA1 Message Date
Alpha Chen d60889b13c [2016][rust][23.1] No inlining for profiling?
8 years ago
Alpha Chen 3ff87286de profiling
8 years ago
246 changed files with 222 additions and 45928 deletions
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1
.gitignore vendored
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**/rust/target

3
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[submodule "2022/bqn/lib"]
path = 2022/bqn/lib
url = https://github.com/mlochbaum/bqn-libs.git

21
2015/ruby/Gemfile.lock
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@ -1,17 +1,17 @@
GEM
remote: https://rubygems.org/
specs:
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concurrent-ruby (~> 1.0, >= 1.0.2)
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PLATFORMS

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5
2016/rust/Cargo.toml
Unescape View File

@ -5,5 +5,8 @@ authors = ["Alpha Chen <alpha.chen@gmail.com>"]
[dependencies]
error-chain = "0.7"
regex = "1.5"
regex = "0.1"
rust-crypto = "0.2"
[profile.release]
debug = true

114
2016/rust/src/assembunny.rs
Unescape View File

@ -10,10 +10,12 @@ pub struct Assembunny {
}
impl Assembunny {
#[inline(never)]
fn instruction(&self, i: usize) -> Option<Instruction> {
self.instructions.get(i).cloned()
}
#[inline(never)]
fn value<V: Into<Variable>>(&self, v: V) -> isize {
let v: Variable = v.into();
match v {
@ -22,6 +24,7 @@ impl Assembunny {
}
}
#[inline(never)]
fn toggle(&mut self, i: usize) {
let instruction = match self.instruction(i) {
Some(x) => x,
@ -31,9 +34,9 @@ impl Assembunny {
let replacement = match instruction {
Instruction::Cpy(a, b) => Instruction::Jnz(a, b),
Instruction::Inc(x) => Instruction::Dec(x),
Instruction::Dec(x) |
Instruction::Tgl(x) => Instruction::Inc(x),
Instruction::Dec(x) => Instruction::Inc(x),
Instruction::Jnz(a, b) => Instruction::Cpy(a, b),
Instruction::Tgl(x) => Instruction::Inc(x),
};
self.instructions[i] = replacement;
}
@ -42,6 +45,7 @@ impl Assembunny {
impl Iterator for Assembunny {
type Item = Registers;
#[inline(never)]
fn next(&mut self) -> Option<Registers> {
let pc = self.value(Register::PC) as usize;
let instruction = match self.instruction(pc) {
@ -54,7 +58,8 @@ impl Iterator for Assembunny {
self.registers[Register::PC] += 1;
match instruction {
Instruction::Cpy(v, Variable::Register(r)) => {
self.registers[r] = self.value(v);
let value = self.value(v);
self.registers[r] = value;
}
Instruction::Inc(Variable::Register(r)) => {
self.registers[r] += 1;
@ -63,8 +68,9 @@ impl Iterator for Assembunny {
self.registers[r] -= 1;
}
Instruction::Jnz(v, delta) if self.value(v) != 0 => {
self.registers[Register::PC] -= 1;
self.registers[Register::PC] += self.value(delta);
let delta = self.value(delta);
let pc = self.value(Register::PC) + delta - 1;
self.registers[Register::PC] = pc;
}
Instruction::Tgl(v) => {
let index = (pc as isize) + self.value(v);
@ -84,18 +90,28 @@ impl Registers {
pub fn new() -> Self {
Registers([0; 5])
}
fn index(r: Register) -> usize {
match r {
Register::PC => 0,
Register::A => 1,
Register::B => 2,
Register::C => 3,
Register::D => 4,
}
}
}
impl ops::Index<Register> for Registers {
type Output = isize;
fn index(&self, _index: Register) -> &isize {
self.0.index(usize::from(_index))
self.0.index(Self::index(_index))
}
}
impl ops::IndexMut<Register> for Registers {
fn index_mut(&mut self, _index: Register) -> &mut isize {
self.0.index_mut(usize::from(_index))
self.0.index_mut(Self::index(_index))
}
}
@ -107,6 +123,18 @@ impl Instructions {
}
}
impl fmt::Display for Instructions {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f,
"{}",
self.0
.iter()
.map(Instruction::to_string)
.collect::<Vec<_>>()
.join("\n"))
}
}
impl ops::Index<usize> for Instructions {
type Output = Instruction;
@ -130,18 +158,6 @@ pub enum Register {
D,
}
impl From<Register> for usize {
fn from(r: Register) -> usize {
match r {
Register::PC => 0,
Register::A => 1,
Register::B => 2,
Register::C => 3,
Register::D => 4,
}
}
}
#[derive(Clone, Copy, Debug, PartialEq)]
pub enum Instruction {
Cpy(Variable, Variable),
@ -151,58 +167,38 @@ pub enum Instruction {
Tgl(Variable),
}
impl fmt::Display for Instruction {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match self {
&Instruction::Cpy(a, b) => write!(f, "cpy {} {}", a, b),
&Instruction::Inc(a) => write!(f, "inc {}", a),
&Instruction::Dec(a) => write!(f, "dec {}", a),
&Instruction::Jnz(a, b) => write!(f, "jnz {} {}", a, b),
&Instruction::Tgl(a) => write!(f, "tgl {}", a),
}
}
}
#[derive(Clone, Copy, Debug, PartialEq)]
pub enum Variable {
Register(Register),
Value(isize),
}
impl From<Register> for Variable {
fn from(r: Register) -> Self {
Variable::Register(r)
}
}
impl From<isize> for Variable {
fn from(i: isize) -> Self {
Variable::Value(i)
}
}
// Display
impl fmt::Display for Instructions {
impl fmt::Display for Variable {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f,
"{}",
self.0
.iter()
.map(Instruction::to_string)
.collect::<Vec<_>>()
.join("\n"))
match self {
&Variable::Register(r) => {
write!(f, "{}", format!("{:?}", r).to_lowercase())
}
}
impl fmt::Display for Instruction {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
Instruction::Cpy(a, b) => write!(f, "cpy {} {}", a, b),
Instruction::Inc(a) => write!(f, "inc {}", a),
Instruction::Dec(a) => write!(f, "dec {}", a),
Instruction::Jnz(a, b) => write!(f, "jnz {} {}", a, b),
Instruction::Tgl(a) => write!(f, "tgl {}", a),
&Variable::Value(v) => write!(f, "{:?}", v),
}
}
}
impl fmt::Display for Variable {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
match *self {
Variable::Register(r) => {
write!(f, "{}", format!("{:?}", r).to_lowercase())
}
Variable::Value(v) => write!(f, "{:?}", v),
}
impl From<Register> for Variable {
fn from(r: Register) -> Self {
Variable::Register(r)
}
}

284
2016/rust/src/day_11.rs
Unescape View File

@ -1,284 +0,0 @@
use regex;
use std::convert::TryFrom;
use std::str;
use errors::*;
// You come upon a column of four floors that have been entirely sealed off from the rest of the
// building except for a small dedicated lobby. There are some radiation warnings and a big sign
// which reads "Radioisotope Testing Facility".
struct Facility {
floors: Vec<Floor>,
}
#[derive(Debug, PartialEq)]
struct Floor {
items: Vec<Item>,
}
impl Floor {
fn generators(&self) -> Vec<String> {
self.items.iter().map(|item| {
match *item {
Item::Generator(ref s) => Some(s),
_ => None,
}
}).flat_map(|x| x).cloned().collect()
}
fn microchips(&self) -> Vec<String> {
self.items.iter().map(|item| {
match *item {
Item::Microchip(ref s) => Some(s),
_ => None,
}
}).flat_map(|x| x).cloned().collect()
}
}
#[test]
fn test_generators_and_microchips() {
let items = vec![
Item::Generator("a".into()),
Item::Microchip("b".into()),
];
let floor = Floor{items};
assert_eq!(floor.generators(), vec!["a".to_string()]);
assert_eq!(floor.microchips(), vec!["b".to_string()]);
}
#[derive(Clone, Debug, PartialEq)]
enum Item {
Generator(String),
Microchip(String),
}
impl<'a> TryFrom<regex::Captures<'a>> for Item {
type Err = Error;
fn try_from(c: regex::Captures) -> Result<Item> {
let element = c.name("element").ok_or("missing element name")?;
let itemtype = c.name("itemtype").ok_or("missing item type")?;
match itemtype {
"generator" => { Ok(Item::Generator(element.into())) },
"microchip" => { Ok(Item::Microchip(element.into())) },
_ => { Err(format!("invalid item type: '{}", itemtype).into()) },
}
}
}
// According to the project status board, this facility is currently being used to experiment with
// Radioisotope Thermoelectric Generators (RTGs, or simply "generators") that are designed to be
// paired with specially-constructed microchips. Basically, an RTG is a highly radioactive rock
// that generates electricity through heat.
//
// The experimental RTGs have poor radiation containment, so they're dangerously radioactive. The
// chips are prototypes and don't have normal radiation shielding, but they do have the ability to
// generate an electromagnetic radiation shield when powered. Unfortunately, they can only be
// powered by their corresponding RTG. An RTG powering a microchip is still dangerous to other
// microchips.
//
// In other words, if a chip is ever left in the same area as another RTG, and it's not connected
// to its own RTG, the chip will be fried. Therefore, it is assumed that you will follow procedure
// and keep chips connected to their corresponding RTG when they're in the same room, and away from
// other RTGs otherwise.
impl Floor {
fn is_safe(&self) -> bool {
if self.generators().is_empty() {
return true;
}
let generators = self.generators();
let microchips = self.microchips();
let unpaired_chips = microchips.iter().filter(|microchip| {
!generators.contains(&microchip)
});
unpaired_chips.count() == 0
}
}
#[test]
fn test_is_safe() {
assert!(Floor{items: Vec::new()}.is_safe());
assert!(Floor{items: vec![Item::Generator("".into())]}.is_safe());
assert!(Floor{items: vec![Item::Microchip("a".into())]}.is_safe());
let items = vec![Item::Generator("a".into()), Item::Microchip("b".into())];
assert!(!Floor{items}.is_safe());
let items = vec![
Item::Generator("a".into()),
Item::Microchip("a".into()),
Item::Generator("b".into()),
];
assert!(Floor{items}.is_safe());
}
// These microchips sound very interesting and useful to your current activities, and you'd like to
// try to retrieve them. The fourth floor of the facility has an assembling machine which can make
// a self-contained, shielded computer for you to take with you - that is, if you can bring it all
// of the RTGs and microchips.
//
// Within the radiation-shielded part of the facility (in which it's safe to have these
// pre-assembly RTGs), there is an elevator that can move between the four floors. Its capacity
// rating means it can carry at most yourself and two RTGs or microchips in any combination.
// (They're rigged to some heavy diagnostic equipment - the assembling machine will detach it for
// you.) As a security measure, the elevator will only function if it contains at least one RTG or
// microchip. The elevator always stops on each floor to recharge, and this takes long enough that
// the items within it and the items on that floor can irradiate each other. (You can prevent this
// if a Microchip and its Generator end up on the same floor in this way, as they can be connected
// while the elevator is recharging.)
//
// You make some notes of the locations of each component of interest (your puzzle input). Before
// you don a hazmat suit and start moving things around, you'd like to have an idea of what you
// need to do.
//
// When you enter the containment area, you and the elevator will start on the first floor.
//
// For example, suppose the isolated area has the following arrangement:
//
// The first floor contains a hydrogen-compatible microchip and a lithium-compatible microchip.
// The second floor contains a hydrogen generator.
// The third floor contains a lithium generator.
// The fourth floor contains nothing relevant.
// As a diagram (F# for a Floor number, E for Elevator, H for Hydrogen, L for Lithium, M for Microchip, and G for Generator), the initial state looks like this:
impl str::FromStr for Facility {
type Err = Error;
fn from_str(input: &str) -> Result<Self> {
let floors = input.lines()
.map(|line| line.parse::<Floor>())
.collect::<Result<Vec<_>>>()?;
Ok(Facility{floors})
}
}
#[test]
fn test_facility_from_str() {
let input = "The first floor contains a hydrogen-compatible microchip and a lithium-compatible microchip.
The second floor contains a hydrogen generator.
The third floor contains a lithium generator.
The fourth floor contains nothing relevant.";
let facility: Facility = input.parse().unwrap();
assert_eq!(facility.floors.len(), 4);
assert_eq!(facility.floors[1], Floor{items: vec![Item::Generator("hydrogen".into())]});
}
impl str::FromStr for Floor {
type Err = Error;
fn from_str(input: &str) -> Result<Self> {
// Ok(Floor{items: Vec::new()})
let re = regex::Regex::new(r"(?P<element>\w+)(-compatible)? (?P<itemtype>generator|microchip)").unwrap();
re.captures_iter(input)
.map(|captures| Item::try_from(captures))
.collect::<Result<Vec<_>>>()
.map(|items| Floor{items} )
}
}
#[test]
fn test_floor_from_str() {
let input = "The first floor contains a hydrogen-compatible microchip and \
a lithium-compatible microchip.";
let floor: Floor = input.parse().unwrap();
assert_eq!(floor.items.len(), 2);
assert!(floor.items.contains(&Item::Microchip("hydrogen".into())));
assert!(floor.items.contains(&Item::Microchip("lithium".into())));
let input = "The first floor contains a hydrogen-compatible microchip and \
a lithium generator.";
let floor: Floor = input.parse().unwrap();
assert_eq!(floor.items.len(), 2);
assert!(floor.items.contains(&Item::Microchip("hydrogen".into())));
assert!(floor.items.contains(&Item::Generator("lithium".into())));
}
// F4 . . . . .
// F3 . . . LG .
// F2 . HG . . .
// F1 E . HM . LM
// Then, to get everything up to the assembling machine on the fourth floor, the following steps could be taken:
//
// Bring the Hydrogen-compatible Microchip to the second floor, which is safe because it can get power from the Hydrogen Generator:
//
// F4 . . . . .
// F3 . . . LG .
// F2 E HG HM . .
// F1 . . . . LM
// Bring both Hydrogen-related items to the third floor, which is safe because the Hydrogen-compatible microchip is getting power from its generator:
//
// F4 . . . . .
// F3 E HG HM LG .
// F2 . . . . .
// F1 . . . . LM
// Leave the Hydrogen Generator on floor three, but bring the Hydrogen-compatible Microchip back down with you so you can still use the elevator:
//
// F4 . . . . .
// F3 . HG . LG .
// F2 E . HM . .
// F1 . . . . LM
// At the first floor, grab the Lithium-compatible Microchip, which is safe because Microchips don't affect each other:
//
// F4 . . . . .
// F3 . HG . LG .
// F2 . . . . .
// F1 E . HM . LM
// Bring both Microchips up one floor, where there is nothing to fry them:
//
// F4 . . . . .
// F3 . HG . LG .
// F2 E . HM . LM
// F1 . . . . .
// Bring both Microchips up again to floor three, where they can be temporarily connected to their corresponding generators while the elevator recharges, preventing either of them from being fried:
//
// F4 . . . . .
// F3 E HG HM LG LM
// F2 . . . . .
// F1 . . . . .
// Bring both Microchips to the fourth floor:
//
// F4 E . HM . LM
// F3 . HG . LG .
// F2 . . . . .
// F1 . . . . .
// Leave the Lithium-compatible microchip on the fourth floor, but bring the Hydrogen-compatible one so you can still use the elevator; this is safe because although the Lithium Generator is on the destination floor, you can connect Hydrogen-compatible microchip to the Hydrogen Generator there:
//
// F4 . . . . LM
// F3 E HG HM LG .
// F2 . . . . .
// F1 . . . . .
// Bring both Generators up to the fourth floor, which is safe because you can connect the Lithium-compatible Microchip to the Lithium Generator upon arrival:
//
// F4 E HG . LG LM
// F3 . . HM . .
// F2 . . . . .
// F1 . . . . .
// Bring the Lithium Microchip with you to the third floor so you can use the elevator:
//
// F4 . HG . LG .
// F3 E . HM . LM
// F2 . . . . .
// F1 . . . . .
// Bring both Microchips to the fourth floor:
//
// F4 E HG HM LG LM
// F3 . . . . .
// F2 . . . . .
// F1 . . . . .
// In this arrangement, it takes 11 steps to collect all of the objects at the fourth floor for assembly. (Each elevator stop counts as one step, even if nothing is added to or removed from it.)
//
// In your situation, what is the minimum number of steps required to bring all of the objects to the fourth floor?
pub fn solve(input: &str) -> Result<String> {
return Ok("".into())
}
#[test]
fn test_solve() {
let input = "The first floor contains a hydrogen-compatible microchip and a lithium-compatible microchip.
The second floor contains a hydrogen generator.
The third floor contains a lithium generator.
The fourth floor contains nothing relevant.";
}

6
2016/rust/src/lib.rs
Unescape View File

@ -1,10 +1,11 @@
#![feature(field_init_shorthand, inclusive_range_syntax, try_from)]
#![feature(alloc_system, field_init_shorthand, inclusive_range_syntax)]
#![recursion_limit = "1024"]
extern crate alloc_system;
extern crate crypto;
#[macro_use]
extern crate error_chain;
extern crate regex;
extern crate crypto;
mod assembunny;
pub mod errors;
@ -18,6 +19,5 @@ pub mod day_07;
pub mod day_08;
// pub mod day_09;
// pub mod day_10;
pub mod day_11;
pub mod day_12;
pub mod day_23;

11
2016/rust/src/main.rs
Unescape View File

@ -1,5 +1,6 @@
use std::io;
use std::io::Read;
use std::env;
use std::fs::File;
use std::io::prelude::*;
extern crate advent_of_code_2016;
use advent_of_code_2016::*;
@ -7,10 +8,12 @@ use advent_of_code_2016::errors::*;
fn main() {
run(|| {
let filename = env::args().nth(1).ok_or("")?;
let mut f = File::open(filename).chain_err(|| "")?;
let mut input = String::new();
io::stdin().read_to_string(&mut input).ok();
f.read_to_string(&mut input).chain_err(|| "")?;
let solution = day_11::solve(&input)?;
let solution = day_23::solve(&input)?;
println!("{}", solution);
Ok(())

2
2017/input/day_01.txt
Unescape View File

@ -1,2 +0,0 @@
3893445835429722678558456317563893861752455542588369533636585887178232467588827193173595918648538852463974393264428538856739259399322741844613957229674619566966921656443476317729968764183945899765294481327998956154956571467872487576314549468261122281384513266834769436913544431258253346374641589492728885222652146158261225296144835682556133922436438188211288458692217737145834468534829945993366314375465767468939773939978272968388546791547526366348163672162245585168892858977723516752284597322176349412485116173844733679871253985762643852151748396593275274582481295864991886985988427966155944392352248314629138972358467959614279553511247863869663526823326467571462371663396188951696286916979923587358992127741723727623235238531991996999181976664226274715591531566495345212849683589582225465555847312199122268773923175183128124556249916458878785361322713513153175157855597289482439449732469754748544437553251412476225415932478849961897299721228198262823515159848941742786272262236888514421279147329383465929358896761449135917829473321834267122759371247338155787774952626616791265889922959653887288735233291968146648533754958199821789499914763279869931218136266492627818972334549751282191883558361871277375851259751294611921756927694394977764633932938573132221389861617195291742156362494769521829599476753198422283287735888197584327719697758442462886311961723849326959213928195182293316227334998926839139915138472514686689887874559367524254175582135318545912361877139367538434683933333264146289842238921989275112323681356256979576948644489986951538689949884787173194457523474156229389465725473817651516136514446513436419126533875125645855223921197481833434658264655912731133356464193251635637423222227273192628825165993827511625956856754776849919858414375874943572889154281862749595896438581889424559988914658387293414662361364793844213298677236787998677166743945812899526292132465751582925131262933636228593134861363493849168168765261647652342891576445292462341171477487223253795935253493869317616741963486473

17
2017/input/day_02.txt
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157 564 120 495 194 520 510 618 244 443 471 473 612 149 506 138
1469 670 47 604 1500 238 1304 1426 54 749 1218 1409 60 51 1436 598
578 184 2760 3057 994 167 2149 191 2913 2404 213 1025 1815 588 2421 3138
935 850 726 155 178 170 275 791 1028 75 781 138 176 621 773 688
212 977 297 645 229 194 207 640 804 509 833 726 197 825 242 743
131 43 324 319 64 376 231 146 382 162 464 314 178 353 123 446
551 121 127 155 1197 288 1412 1285 557 137 145 1651 1549 1217 681 1649
1723 1789 5525 4890 3368 188 3369 4842 3259 2502 4825 163 146 2941 126 5594
311 2420 185 211 2659 2568 2461 231 2599 1369 821 506 2227 180 220 1372
197 4490 141 249 3615 3314 789 4407 169 352 4383 5070 5173 3115 132 3513
4228 2875 3717 504 114 2679 165 3568 3002 116 756 151 4027 261 4813 2760
651 3194 2975 2591 1019 835 3007 248 3028 1382 282 3242 296 270 3224 3304
1858 1650 1720 1848 95 313 500 1776 207 1186 72 259 281 1620 79 77
3841 3217 440 3481 3643 940 3794 4536 1994 4040 3527 202 193 1961 230 217
2837 2747 2856 426 72 78 2361 96 2784 2780 98 2041 2444 1267 2167 2480
411 178 4263 4690 3653 162 3201 4702 3129 2685 3716 147 3790 4888 79 165

1
2017/input/day_03.txt
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361527

513
2017/input/day_04.txt
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1057
2017/input/day_05.txt
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2
2017/input/day_06.txt
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4 10 4 1 8 4 9 14 5 1 14 15 0 15 3 5

1455
2017/input/day_07.txt
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1001
2017/input/day_08.txt
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2
2017/input/day_09.txt
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1
2017/input/day_10.txt
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147,37,249,1,31,2,226,0,161,71,254,243,183,255,30,70

2
2017/input/day_11.rb
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2001
2017/input/day_12.txt
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44
2017/input/day_13.txt
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0: 3
1: 2
2: 4
4: 8
6: 5
8: 6
10: 6
12: 4
14: 6
16: 6
18: 17
20: 8
22: 8
24: 8
26: 9
28: 8
30: 12
32: 12
34: 10
36: 12
38: 12
40: 8
42: 12
44: 12
46: 10
48: 12
50: 12
52: 14
54: 14
56: 12
58: 14
60: 14
62: 14
64: 14
66: 14
68: 12
70: 14
72: 14
74: 14
76: 14
80: 18
82: 14
90: 18

1
2017/input/day_14.txt
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xlqgujun

3
2017/input/day_15.txt
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Generator A starts with 679
Generator B starts with 771

2
2017/input/day_16.txt
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1
2017/input/day_17.txt
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328

202
2017/input/day_19.txt
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|
+---------------------------------------------------------------------------+ +---------------------+ +---+ +-------------------------------------+
| | | | | | | | |
+---------------+ +---------------+ +-------|-------------------------------------+ | | | | +-----------+ +-----+
| | | | | | | | | | | | | | | | |
+---+ | | +-------+ | | +-----------------------------|-------------------------------------------|-----------+ | | | | | | +-----------+
| | | | | | | | | | | | | | | | | | | | | | | | |
+-----------+ | +-|-----------|-----------+ | +---+ | | | +-----------------------|-|---------------|-------|-----------|-----------------------+ |
| | | | | | | | | | | | | | | | | M | | | | | | | | |
| | | +-|-----------|---------------------|-----+ | | | | | +---------+ +-+ +---------------|-----------|---------------+ | +-+ |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | +-------------------------|---------------|---------------|-------|-------+ | | +-----+ +-----+ | | | | | | | +---+ +-+ | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | +---|-+ | +---+ | +---------------------------------------|-------------|---------------------------|-----|-|---|-------|---------------------|-|-|---------+ |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | +---+ | | | | | | | | +-------|-------|-------|---|-|-----|---------------|-----------|-------------|-|-----------|---|-|-|-|---+ | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | +-----------------------------|---------------------|---|-|-------------------|-|-----------|---|-|-|-|-------|-|---+
| | | | C | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | +-|---|-----|-|-----------|-------|-----------------------------|-------------+ | | | | | | +-------------|-|---|-|-|---|---+ | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | +-|---|-----|-------------|-------|-----------------------------|---------------|-------------------|-------|-----|---------|---|-+ | | | | | | | | | +-|---|---|-----|-+ |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| +---+ | | | | | | | | +-+ | +---------------------|---+ | | | | | | | +-|-----|-|-------------|-----------+ | | | | | | | | +---+
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | P |
| | | | | | | | | | | | | +-+ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | +---|-+ | +---|-|-----|-----------|-+ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | +---|---------+ | | +---|-|-|---|---------|-----------|-+ +-+ | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | +-------+ | | | | | | | | | | +-------+ | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | +---|---|---|---------|-----+ +-----|-|-----|-------------------|-----|-------------|-|-------|-----------|-|-----|-------------------|-------|---------|---|-----------|-----------+ | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | +-------+ | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | +---+ | | | | | | | | | | | | | | | | | | | | | | | +-|-+ Y +-|-|-----+ | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | +-+ | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | +-|-------|-----|-|-----|-------------------|-------------|---------------|---------------------|-----|-|---------|-|---|-|-|-------|---|-------+ | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | +-----|---------|-------------|---------------|---|---|-|-|-----|-+ | | +-------|-+ +---|---|-------+ | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | +-------------------|-------|-------------|---+ | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | +-|-------------------|---|-----+ | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | +-----|-----|---------|-------|---|-|-------------------|---------------------------------------------|-|-----|---+ | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | +-|-+ | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | +-----|---|-|-|-----|-----|-+ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | +-------|-|-----|-----|-+ | | +---+ | +---------|-------|---------|-|---|-----|-|-|-+ | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | +---|-|---------------|-|---|-|-----|-------------|-+ | | | +-----------|-------------|---------+ | | | | | +-----+ | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | +-------|---------------------------|---|-------|---+ +-------|---+ | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | +-+ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | +-----|---------------|-|-----------|-|-----|-----|-|---|---|-----------------+ | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | Q | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | +-----+ | | | | | | | | | +-+ | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | +-----------|---|---------|-|-----------------------+ | | | | | | | | | | | | | | | | +---------------------|-|-|-----------|----------E------+ | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | +---------|-|---|-----------|-|-|---+ | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | +---|-------|---|-+ | | +-|-------------|-|-----------|-----|---|-----+ | | +-+ | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | +-----------------|-|---|-----|-----------|---|-|---------------|-----|-------------------|-|-|-----|---------------+ | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | +---|-|---|-------|---|-----|---|-----------|---------------|-----|-------|---|-----|-----------------+ | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | +-------+ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | +---------------|-+ | | +-|-|-------------------|-----------|-----|-|-|-|---------------|-|-----------|-----|-|-|---------------------|-------------|-|-|-|-----|-|-+ | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | +-|---+ | | | | | | | | | | | | | | | +-|---|-----+ | +---|---|-|---+ | | | +-------|-|-------|---|-|---|-------|-----+ | +-------|-----+ | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | +-+ | | | | | | | | | | +-----------|-|-|---|---|-------|---|---|---------------|-|-|---------+ | | +-|---|---------|-|-----------|-------|-------|-----|-----|-----|---+ | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | +-------|-|-+ | |
| | | | | | | | | | | | | | | | | | | | | | H | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | +-|---|-----+ | | | | | | | | | | | | | | | | +-|-------|---|-|-----------|-----------|-|---+ | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | +-----|-|-------|-|-----|---|-----|-------------------|-------|-+ | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | +-|-----+ | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | +---|-|---|-|---|-----------|---|-----|-|---------|---|-------------|-|-----|-----|-------|-------|-------|---|---|-|-|-|-----------------------------------|-------------+
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | +-|-------|---+ | | | | | | | | | | | | | | | | | | | | | | | | | +-----|-+ | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | +-------|---|-------|---------------|-|---------|-----|---|-----------|---|-|-|-|-----------------------------|-------|-|---------+ | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | +-+ | | | | | +---|-----|-----------------|-|-------+ | | | | | | | +-|-------+ | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | +---|---|-------|-|---|-----------------+ | | | | +---+ | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | +-------|-|-|-|-------|---------|-|-------------|-|---|-|-----|-|-------------------|-------|-|-------|-------------+ | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | +-----+ | | | | | | | | | | | | +---------|-----+ | +-+ | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | +-|-----------|---|-|---|-------+ +-------|-----------+ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | +-|-----+ | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | +---|-|---------|-|---------------+ | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | +---|---------|---|---------------|---|---|-----|---------|-------|---------------------|---|-------|-|-|-----+ | | | | | | | | | | | | |
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| | | | +-|-+ | | | | | | | | | | | | | | | | | | | | | | | | +-|---------|-------------------|-----------|---|-----|-------|-----|---------|-+ | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | +-----|-----+ | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | +-|---|-|---|-|-----|---|-|---|-|-+ +---|-+ | | | | | | | +-------|-----+ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | +---+ | | | | | | | | | | | | | | | | | | | | | | | | | +---|-----|-------|-|-----------------|-|-|-|-|---|-|---|-|-|-|-------------------|-------|---|-----+ | | |
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| | | +-----|---+ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | +-------|---------|-------|-|-|-------|-----|-|-|-|---------|-----|-----+ | | | | |
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| | | | | | | | | | | | | | | | | | +-|-+ | +-------------|---|---|---------|-------------|-|---------|-------|---|-|-|-------|-|-|---------|-------|-|---|-----------|-----+ | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | +-----|-----|---------|-+ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | +-----+ | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | +-------|-----------|-------|-|-------|-----+ | | | | | +---|-|-|---|-|-|-+ | | | | | | | | | | | | | | | |
| | | | | | | | | | | S | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | +---|-------|---------------------------------|---------|-----------------|---|-|---|-|---+ | | | +---------|-----|---------+ | | | | +-|-+
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
+-----|-|---|-|---|-----------|-----|-|---|-----|---------|---+ | | | | | +-------|-+ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | +---|-----|---------|-----|---|-|-|-|-----|-------|-------|---|-----|-------+ +-|-|-------|-|---------------------|-|-|-------------------|-|-+ | | +-|---+ | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
+-------------|-|-|-|-----|---------|-----|-|-----|-|---------------------|---|-----|---------|-|-|-|-------|---------+ | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | +-|-----|-|---|-|-----|---------------|---|---|---|---|-------|-------|-------|-----+ | | | | | | | | | | | | | +---|-+ | | | | | | | | | | | | | +-+ | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | +---|---|-|-----------|---|-------|-------|---+ | | | | +-----------------------|---|-------|---+ +---------------|-----+ | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | +---+ | +-|---|-+ +-----|-----|-+ +-+ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | +-|-----------|-|---|---+ | +-------|-+ | | | | | | | | | +---|-+ | | | | | | +-|-|-----|-----+ | | | | +---+ | +-+ | +-+ | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| +-----|-|V------|-|---|-|---------|-|-------|-----|-----------------|-------------------------|---------|-----|---------------------------+ | | | | +-|-+ | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | +-|-|-----|-|-|-|---------------------|-|-------|---------------|---|-------|-------------|---------|-|-----------+ | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | +-----+ | | | | | | +---|-----------|-|---------------|-------|---|-|-----------------------|---|-----------------|-----|-------|-|---|-|---|---+ | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | +---------|-|---|-|-|-----------------|-|-------------------|-------|---|-------------------|---------|---------------------|-|-----|-------|---|-|---|-------------------|-|-----|---|-|-----+ |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| +-|-----|-----+ +---|---|-----------------|---+ | | | | | | | | | | | | | +-----------+ | | | | | | | | | | +-|---|-----|-----+ | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
+-|-|-----|---------|-|-+ | +-----|-|-+ | | | | | | | | | | | | | +-----------|---+ | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
+---------|---------|-|-----------------|-+ | | | +---|-------|---|---|---|---------------+ | | | | | +-|-------+ | | | | | | | | +---------------------|-+ | +-----+ |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | +---|---------+ +-+ | | | | | +---------|---------------+ | +-|---------------|-------|-----|---------------|-|-----|-------|-------|---------------------|-|---+ | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | +---+ | | +---|-----------|---|-----------|-----------|-|---------|-|-----------|-----------|-|---|-|-------------------------|-----|-------------+
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | +-------|-|-+ | | | | | | | | | | | | | +-----------|-----+ | +---+ | | | | | | | +---------------------+ +-------|-------+
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | +-----|-----|-+ | | +-|-----------|---|-----------------|---+ | | | +-----+ | +-------|-----------+ | | | | | +-------------|-------------+
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | +---------|---|---|---|-------|-|-|-----------|-|-|---------|-------------------+ | +---|-------------+ +-------------|-----+
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | +-----------|-----|-----------+ | | +-----|-|-|-------------------------|-----------+ +-|-|-|-------------+ |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | +---------------------|-----|-------|-|---------|-----|-----------|-|-----|---|-+ +-------+ | +-|-|-+ | | | +---------------------------------+
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | +-|-|---------|---|-------|---------|---|-|---------------|-------|---------|---------|-|-|-|---------|---------------------|-------|---------+ | | +-+
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | +-------|-----|-----------|---|---|---+ | | | | | | +-+ +---------|---------------+ | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | +---+ | | | | | | | | | | | | | +---------|-|-|-------|---------+ | | +---------|-----+ +-+ | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | +---------|-+ | | | | | +-----+ | +-----|-------+ +-+ +---------------+ | | | | | | |
| | | | | | | | | | | | | | | | | | | | | | | | | |
| | | | | | | +---------|-------|---------|---|---|-----|-----------|---------------------------------------------|-------+ +-------------------------------------|---------------+
| | | | | | | | | | | | | | | | | | | | | | | |
| | | +---------+ | +-------------|-----------|---------|---|-------------|-------------------------------------------------+ | | | | |
| | | | | | | | | | | | | | | | | | | |
| | | | +---------+ +---------|---+ +---|---------+ +-+ +---------------------------------------------+ | | | | |
| | | | | | | | | | | | | | | | | |
+-+ +-------------------------|-----------+ +-+ +---|---+ | +---------------------------------------------------------------+ +-----+ | +-------------+
| | | | | |
+-----+ +-------+ +--------------------------------------------B----------------------------------------------------------------------+

5
2017/ruby/day_01.rb
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# p ARGF.read.strip.chars.map(&:to_i).each_cons(2).select {|a,b| a == b }.map(&:first).sum
a = ARGF.read.strip.chars.map(&:to_i)
b = a.rotate(a.size/2)
p a.zip(b).select {|a,b| a == b }.map(&:first).sum

5
2017/ruby/day_02.rb
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@ -1,5 +0,0 @@
p ARGF.read.strip.split("\n")
.map {|line| line.split("\t").map(&:to_i) }
.map {|row| row.combination(2).map(&:sort).map(&:reverse).find {|a,b| (a.to_f / b.to_f) * 10 % 10 == 0 }}
.map {|a,b| a / b}
.sum

100
2017/ruby/day_03.rb
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@ -1,100 +0,0 @@
require "minitest"
class Spiral
def initialize
@state = [0,0]
end
def each
return enum_for(__method__) unless block_given?
(1..Float::INFINITY).lazy
.flat_map {|i| [i, i] }
.zip(%i[r u l d].cycle)
.flat_map {|n,d| Array.new(n, d) }
.each do |dir|
yield @state
@state = @state.zip(
case dir
when :r
[1, 0]
when :u
[0, 1]
when :l
[-1, 0]
when :d
[0, -1]
end
).map {|a,b| a + b }
end
end
end
class Grid
def initialize
@grid = Hash.new {|h,(x,y)|
neighbors = [[-1, 1], [0, 1], [1, 1],
[-1, 0], [1, 0],
[-1,-1], [0,-1], [1,-1]]
h[[x,y]] = neighbors
.map {|i,j| [x+i,y+j] }
.select {|i,j| h.has_key?([i,j]) }
.map {|i,j| h[[i,j]] }
.sum
}
@grid[[0,0]] = 1
end
def [](x,y)
@grid[[x,y]]
end
end
if $0 == __FILE__
case ARGV.shift
when "test"
require "minitest/autorun"
when "0"
input = ARGF.read.to_i
p Spiral.new.each.with_index.find {|_,i| i == input - 1 }.first.sum
when "1"
input = ARGF.read.to_i
grid = Grid.new
p Spiral.new.each.lazy.map {|x,y| grid[x,y] }.find {|value| value > input }
end
end
class TestSpiral < Minitest::Test
def test_spiral
spiral = Spiral.new
e = spiral.each
assert_equal [0,0], e.next
assert_equal [1,0], e.next
assert_equal [1,1], e.next
assert_equal [0,1], e.next
assert_equal [-1,1], e.next
assert_equal [-1,0], e.next
assert_equal [-1,-1], e.next
assert_equal [0,-1], e.next
assert_equal [1,-1], e.next
assert_equal [2,-1], e.next
spiral = Spiral.new
assert_equal [0,-2], spiral.each.with_index.find {|_,i| i == 22 }.first
end
end
class TestGrid < Minitest::Test
def test_grid
grid = Grid.new
assert_equal 1, grid[0,0]
assert_equal 1, grid[1,0]
assert_equal 2, grid[1,1]
assert_equal 4, grid[0,1]
assert_equal 5, grid[-1,1]
assert_equal 10, grid[-1,0]
end
end

30
2017/ruby/day_04.rb
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@ -1,30 +0,0 @@
class Passphrase
def initialize(raw)
@raw = raw
end
def valid?
words = @raw.split(/\s+/).map {|word| word.split(//).sort.join }
words.uniq.size == words.size
end
end
# require "minitest/autorun"
if $0 == __FILE__
p ARGF.read.split("\n").map {|line| Passphrase.new(line) }.select(&:valid?).size
end
require "minitest"
class TestPassphrase < Minitest::Test
def test_valid
# assert Passphrase.new("aa bb cc dd ee").valid?
# refute Passphrase.new("aa bb cc dd aa").valid?
# assert Passphrase.new("aa bb cc dd aaa").valid?
assert Passphrase.new("abcde fghij").valid?
refute Passphrase.new("abcde xyz ecdab").valid?
assert Passphrase.new("a ab abc abd abf abj").valid?
assert Passphrase.new("iiii oiii ooii oooi oooo").valid?
refute Passphrase.new("oiii ioii iioi iiio").valid?
end
end

14
2017/ruby/day_05.rb
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instructions = ARGF.read.strip.split("\n").map(&:to_i)
pc = 0
count = 0
while (0...instructions.size).cover?(pc)
offset = instructions[pc]
if offset >= 3
instructions[pc] -= 1
else
instructions[pc] += 1
end
pc += offset
count += 1
end
p count

36
2017/ruby/day_06.rb
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@ -1,36 +0,0 @@
require "set"
class Day6
def initialize(banks)
@banks = banks
end
def each
return enum_for(__method__) unless block_given?
loop do
yield @banks.dup
value, i = @banks.map.with_index.max_by(&:first)
@banks[i] = 0
value.times do |offset|
@banks[(i+offset+1) % @banks.size] += 1
end
end
end
end
banks = ARGF.read.strip.split("\t").map(&:to_i)
day6 = Day6.new(banks).each.lazy
seen = Set.new
needle, i = day6.with_index.find {|config,_|
if seen.include?(config)
true
else
seen << config
false
end
}
p i
p day6.with_index.drop(1).find {|config,_| config == needle }.last

20
2017/ruby/day_07.rb
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@ -1,20 +0,0 @@
Program = Struct.new(:name, :weight, :disc)
programs = {}
ARGF.read.strip.split("\n").each do |line|
name, weight, above = line.scan(/(.+) \((\d+)\)(?: -> (.+))?/)[0]
programs[name] = Program.new(name, weight.to_i, (above || "").split(", "))
end
disc_weights = Hash.new {|h,k|
program = programs[k]
h[k] = if program.disc.empty?
program.weight
else
program.weight + program.disc.map {|x| h[programs[x].name] }.sum
end
}
root = "mkxke"
p programs[root].disc.map {|n| [n, disc_weights[n]] }
require "pry"; binding.pry

20
2017/ruby/day_08.rb
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instructions = ARGF.read.strip.scan(/(\w+) (dec|inc) (-?\d+) if (\w+) ([!<=>]+) (-?\d+)/m)
max = 0
registers = Hash.new(0)
instructions.each do |instruction|
condition_value = registers[instruction[-3]]
if eval("#{condition_value} #{instruction[-2]} #{instruction[-1]}")
value = registers[instruction[0]]
case instruction[1]
when "inc"
value += instruction[2].to_i
when "dec"
value -= instruction[2].to_i
else
raise instruction
end
registers[instruction[0]] = value
max = [value, max].max
end
end
p max

25
2017/ruby/day_09.rb
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@ -1,25 +0,0 @@
require "strscan"
input = ARGF.read.strip
input = input.gsub(/!./, "")
p input.scan(/<[^>]*>/).map {|g| g.size - 2 }.sum
input = input.gsub(/<[^>]*>/, "")
.gsub(?,, "")
ss = StringScanner.new(input)
score = 0
group = 0
until ss.eos?
case
when ss.scan(/\{/)
group += 1
when ss.scan(/\}/)
score += group
group -= 1
else
raise "omg!"
end
end
p score

33
2017/ruby/day_10.rb
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@ -1,33 +0,0 @@
list = (0..255).to_a
current = 0
# lengths = ARGF.read.strip.split(?,).map(&:to_i)
input = ARGF.read.strip
p input
lengths = input.split(//).map(&:ord)
p lengths
lengths.concat([17, 31, 73, 47, 23])
skip = 0
# list = (0..4).to_a
# lengths = [3,4,1,5]
64.times do
lengths.each do |length|
list[0, length] = list[0, length].reverse
list = list.rotate(length + skip)
current += length + skip
current %= list.size
skip += 1
# p list.rotate(list.size - current)
end
end
list = list.rotate(list.size - current)
p list
dense = list.each_slice(16).map {|slice| slice.inject(&:^) }
p dense
p hex = dense.map {|n| n.to_s(16).rjust(2, ?0) }.join
# list = list.rotate(list.size - current)
# p list[0] * list[1]

26
2017/ruby/day_11.rb
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@ -1,26 +0,0 @@
dirs = ARGF.read.strip.split(?,)
current = [0, 0, 0]
max = 0
dirs.each do |dir|
delta = case dir
when "nw"
[-1, 1, 0]
when "n"
[0, 1, -1]
when "ne"
[1, 0, -1]
when "sw"
[-1, 0, 1]
when "s"
[0, -1, 1]
when "se"
[1, -1, 0]
else
raise "omg!"
end
current = current.zip(delta).map {|a,b| a + b }
max = [max, current.map(&:abs).sum / 2].max
end
p current
p current.map(&:abs).sum / 2
p max

31
2017/ruby/day_12.rb
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@ -1,31 +0,0 @@
require "set"
@programs = Hash[
ARGF.read.strip
.lines
.map {|line| line.scan(/\d+/).map(&:to_i) }
.map {|x| [x.shift, x] }
]
def group(id)
group = Set.new
queue = [id]
until queue.empty?
program = queue.shift
next if group.include?(program)
group << program
queue = queue.concat(@programs[program])
end
group
end
p group(0).size
count = 0
until @programs.empty?
group(@programs.keys.first).each do |program|
@programs.delete(program)
end
count += 1
end
p count

11
2017/ruby/day_13.rb
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@ -1,11 +0,0 @@
firewall = Hash[ARGF.read.strip.scan(/(\d+): (\d+)/).map {|x| x.map(&:to_i) }]
def caught?(time, range)
(time % (2 * (range - 1))).zero?
end
p firewall.select {|depth, range| caught?(depth, range) }.map {|d,r| d * r }.sum
p (1..Float::INFINITY).find {|delay|
firewall.none? {|depth, range| caught?(delay+depth, range) }
}

52
2017/ruby/day_14.rb
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@ -1,52 +0,0 @@
input = ARGF.read.strip
def knot_hash(input)
list = (0..255).to_a
current = 0
lengths = input.split(//).map(&:ord)
lengths.concat([17, 31, 73, 47, 23])
skip = 0
64.times do
lengths.each do |length|
list[0, length] = list[0, length].reverse
list = list.rotate(length + skip)
current += length + skip
current %= list.size
skip += 1
end
end
list = list.rotate(list.size - current)
dense = list.each_slice(16).map {|slice| slice.inject(&:^) }
hex = dense.map {|n| n.to_s(16).rjust(2, ?0) }.join
hex.hex.to_s(2).rjust(128, ?0)
end
# p (0..127).map {|i| "#{input}-#{i}" }.map {|row| knot_hash(row) }.join.split(//).select {|c| c == ?1 }.count
# input = "flqrgnkx"
grid = (0..127).map {|i| "#{input}-#{i}" }.map {|row| knot_hash(row).split(//) }
regions = 0
queue = []
(0..127).each do |y|
(0..127).each do |x|
if grid[y][x] == ?1
regions += 1
grid[y][x] = ?0
queue << [x, y]
until queue.empty?
xx,yy = queue.shift
[[0, 1], [0, -1], [1, 0], [-1, 0]].each do |dx, dy|
xxx = xx + dx
yyy = yy + dy
if (0..127).cover?(xxx) && (0..127).cover?(yyy) && grid[yyy][xxx] == ?1
grid[yyy][xxx] = ?0
queue << [xxx, yyy]
end
end
end
end
end
end
p regions

28
2017/ruby/day_15.rb
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@ -1,28 +0,0 @@
start_a, start_b = ARGF.read.strip.scan(/\d+/).map(&:to_i)
class Generator
def initialize(start, factor)
@value = start
@factor = factor
end
def each
return enum_for(__method__) unless block_given?
loop do
@value *= @factor
@value %= 2147483647
yield @value
end
end
end
# start_a, start_b = 65, 8921
a = Generator.new(start_a, 16807).each.lazy
b = Generator.new(start_b, 48271).each.lazy
p a.zip(b).take(40_000_000).with_index.count {|(a,b),i|
p i if i % 1_000_000 == 0
# a.to_s(2)[-16,16] == b.to_s(2)[-16,16]
a & 0b1111111111111111 == b & 0b1111111111111111
}

32
2017/ruby/day_16.rb
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@ -1,32 +0,0 @@
require "strscan"
@dance = ARGF.read.strip
@programs = (?a..?p).to_a
def run
ss = StringScanner.new(@dance)
until ss.eos?
case
when ss.scan(/s(\d+)/)
@programs.rotate!(@programs.size - ss[1].to_i)
when ss.scan(/x(\d+)\/(\d+)/)
a, b = ss[1].to_i, ss[2].to_i
@programs[a], @programs[b] = @programs[b], @programs[a]
when ss.scan(/p(\w)\/(\w)/)
a, b = @programs.index(ss[1]), @programs.index(ss[2])
@programs[a], @programs[b] = @programs[b], @programs[a]
when ss.scan(/,/)
end
end
end
@memoized = {}
count = 0
until @memoized.has_key?(@programs.join)
@memoized[@programs.join] = count
run
count += 1
end
mod = 1_000_000_000 % count
p @memoized.find {|_,v| v == mod }.first

21
2017/ruby/day_17.rb
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@ -1,21 +0,0 @@
input = ARGF.read.strip.to_i
# input = 3
# buffer = [0]
pos = 0
50_000_000.times do |i|
# 10.times do |i|
pos += input + 1
# pos %= buffer.size
pos %= i + 1
p i+1 if pos.zero?
# buffer = (buffer[0..pos] << i+1).concat(buffer[pos+1..-1])
end
# index = buffer.index(0)
# p buffer[index+1]
# So 0 is always element 0...
# So we just need to know when something is inserted at element 1?

36
2017/ruby/day_19.rb
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@ -1,36 +0,0 @@
diagram = ARGF.read.split("\n").map(&:chars)
dir = [0, 1]
y = 0
x = diagram[y].index(?|)
begin
steps = 0
loop do
case diagram[y][x]
when ?+
dir = if dir[0] == 0 # going vertically
if (diagram[y][x-1] || " ") != " "
[-1, 0]
else
[1, 0]
end
else # going horizontally
if (diagram[y-1][x] || " ") != " "
[0, -1]
else
[0, 1]
end
end
when /[a-z]/i
# print diagram[y][x]
when /\||\+|-/
else
raise diagram[y][x]
end
x,y = [x,y].zip(dir).map {|a,b| a + b}
steps += 1
end
rescue
puts steps
end

1
2017/rust/.gitignore vendored
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@ -1 +0,0 @@
target

247
2017/rust/Cargo.lock generated
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@ -1,247 +0,0 @@
[[package]]
name = "advent_of_code_2017"
version = "0.1.0"
dependencies = [
"failure 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
"lazy_static 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
"regex 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
"time 0.1.38 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "aho-corasick"
version = "0.6.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"memchr 2.0.1 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "backtrace"
version = "0.3.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"backtrace-sys 0.1.16 (registry+https://github.com/rust-lang/crates.io-index)",
"cfg-if 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
"dbghelp-sys 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
"kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
"libc 0.2.34 (registry+https://github.com/rust-lang/crates.io-index)",
"rustc-demangle 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
"winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "backtrace-sys"
version = "0.1.16"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"cc 1.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
"libc 0.2.34 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "cc"
version = "1.0.3"
source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
name = "cfg-if"
version = "0.1.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
name = "dbghelp-sys"
version = "0.2.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
"winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "failure"
version = "0.1.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"backtrace 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)",
"failure_derive 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "failure_derive"
version = "0.1.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"quote 0.3.15 (registry+https://github.com/rust-lang/crates.io-index)",
"syn 0.11.11 (registry+https://github.com/rust-lang/crates.io-index)",
"synstructure 0.6.1 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "kernel32-sys"
version = "0.2.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
"winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "lazy_static"
version = "1.0.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
name = "libc"
version = "0.2.34"
source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
name = "memchr"
version = "2.0.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"libc 0.2.34 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "quote"
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10
2017/rust/Cargo.toml
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@ -1,10 +0,0 @@
[package]
name = "advent_of_code_2017"
version = "0.1.0"
authors = ["Alpha Chen <alpha.chen@gmail.com>"]
[dependencies]
failure = "0.1"
lazy_static = "1.0"
regex = "0.2"
time = ""

32
2017/rust/src/day_01.rs
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@ -1,32 +0,0 @@
use failure::*;
#[allow(dead_code)]
pub fn solve(input: &str) -> Result<String, Error> {
let input: Vec<u32> = input
.trim()
.chars()
.map(|x| x.to_digit(10).ok_or_else(|| err_msg("")))
.collect::<Result<_, _>>()?;
// 1
// let offset = 1;
let offset = input.len() / 2;
let offset_iter = input.iter().cycle().skip(offset);
Ok(input
.iter()
.zip(offset_iter)
.filter(|&a| a.0 == a.1)
.map(|a| a.0)
.sum::<u32>()
.to_string())
}
#[test]
fn part_two() {
assert_eq!(solve("1212").unwrap(), "6".to_string());
assert_eq!(solve("1221").unwrap(), "0".to_string());
assert_eq!(solve("123425").unwrap(), "4".to_string());
assert_eq!(solve("123123").unwrap(), "12".to_string());
assert_eq!(solve("12131415").unwrap(), "4".to_string());
}

31
2017/rust/src/day_02.rs
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@ -1,31 +0,0 @@
use failure::*;
#[allow(dead_code)]
pub fn solve(input: &str) -> Result<String, Error> {
Ok(input
.trim()
.split('\n')
.map(|row| {
row.split('\t')
.map(|x| x.parse::<usize>().unwrap())
.collect::<Vec<_>>()
})
.map(|row| checksum(&row))
.sum::<usize>()
.to_string())
}
fn checksum(row: &[usize]) -> usize {
// 1
// let min = row.iter().min().unwrap();
// let max = row.iter().max().unwrap();
// max - min
row.iter()
.flat_map(|x| row.iter().map(|y| (x, y)).collect::<Vec<_>>())
.filter(|&(a, b)| a != b)
.filter(|&(&a, &b)| (a as f64) % (b as f64) == 0.0)
.map(|(&a, &b)| a / b)
.next()
.unwrap()
}

90
2017/rust/src/day_03.rs
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@ -1,90 +0,0 @@
use std::collections::HashMap;
use std::iter;
use failure::*;
#[allow(dead_code)]
pub fn solve(input: &str) -> Result<String, Error> {
let input: usize = input.trim().parse()?;
// 1
// spiral()
// .zip(1..)
// .find(|&(_, i)| i == (square - 1))
// .map(|(coord, _)| (coord.0 + coord.1).to_string())
// .ok_or_else(|| format_err!(""))
// 2
let mut grid = HashMap::new();
grid.insert(Coord(0, 0), 1);
spiral()
.map(|coord| {
let sum = coord.neighbors().iter().filter_map(|x| grid.get(x)).sum();
grid.insert(coord, sum);
sum
})
.find(|value| value > &input)
.map(|value| value.to_string())
.ok_or_else(|| err_msg(""))
}
#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
struct Coord(isize, isize);
impl Coord {
#[allow(dead_code)]
fn neighbors(&self) -> Vec<Coord> {
vec![
[-1, 1],
[0, 1],
[1, 1],
[-1, 0],
[1, 0],
[-1, -1],
[0, -1],
[1, -1],
].iter()
.map(|delta| Coord(self.0 + delta[0], self.1 + delta[1]))
.collect()
}
}
#[derive(Clone, Copy, Debug, PartialEq)]
enum Dir {
Right,
Up,
Left,
Down,
}
#[allow(dead_code)]
lazy_static! {
static ref DIRS: Vec<Dir> = vec![Dir::Right, Dir::Up, Dir::Left, Dir::Down];
}
#[allow(dead_code)]
fn spiral() -> impl Iterator<Item = Coord> {
(1..)
.flat_map(|x| iter::repeat(x).take(2))
.zip(DIRS.iter().cycle())
.flat_map(|(steps, dir)| iter::repeat(dir).take(steps))
.scan(Coord(0, 0), |state, &dir| {
*state = match dir {
Dir::Right => Coord(state.0 + 1, state.1),
Dir::Up => Coord(state.0, state.1 + 1),
Dir::Left => Coord(state.0 - 1, state.1),
Dir::Down => Coord(state.0, state.1 - 1),
};
Some(*state)
})
}
#[test]
fn test_coords() {
let mut spiral = spiral();
assert_eq!(spiral.next(), Some(Coord(1, 0)));
assert_eq!(spiral.next(), Some(Coord(1, 1)));
assert_eq!(spiral.next(), Some(Coord(0, 1)));
assert_eq!(spiral.next(), Some(Coord(-1, 1)));
assert_eq!(spiral.next(), Some(Coord(-1, 0)));
assert_eq!(spiral.next(), Some(Coord(-1, -1)));
}

39
2017/rust/src/day_04.rs
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@ -1,39 +0,0 @@
use std::collections::HashSet;
use failure::Error;
#[allow(dead_code)]
pub fn solve(input: &str) -> Result<String, Error> {
Ok(input
.trim()
.lines()
.map(|line| Passphrase { words: line.into() })
.filter(Passphrase::is_valid)
.count()
.to_string())
}
#[allow(dead_code)]
struct Passphrase {
words: String,
}
impl Passphrase {
#[allow(dead_code)]
fn is_valid(&self) -> bool {
let mut words = HashSet::new();
!self.words
.split_whitespace()
.map(|word| {
let mut chars: Vec<String> = word.chars().map(|x| x.to_string()).collect();
chars.sort();
chars.as_slice().join("")
})
.any(|word| {
if words.contains(&word) {
return true;
}
words.insert(word);
false
})
}
}

26
2017/rust/src/day_05.rs
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@ -1,26 +0,0 @@
use std::collections::HashMap;
use std::collections::hash_map::Entry;
use failure::*;
#[allow(dead_code)]
pub fn solve(input: &str) -> Result<String, Error> {
let mut jumps: HashMap<isize, isize> = input
.trim()
.lines()
.enumerate()
.map(|(i, x)| x.parse().map(|x| (i as isize, x)))
.collect::<Result<_, _>>()?;
let mut pc = 0;
let mut steps = 0;
while let Entry::Occupied(mut entry) = jumps.entry(pc) {
let offset = entry.get_mut();
pc += *offset;
if *offset >= 3 {
*offset -= 1;
} else {
*offset += 1;
}
steps += 1;
}
Ok(steps.to_string())
}

76
2017/rust/src/day_06.rs
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@ -1,76 +0,0 @@
use std::collections::HashSet;
use failure::*;
#[allow(dead_code)]
pub fn solve(input: &str) -> Result<String, Error> {
let banks: Vec<_> = input
.split_whitespace()
.map(str::parse)
.collect::<Result<_, _>>()?;
let mut reallocation = Reallocation {
banks: banks.clone(),
};
let cycles = unique_cycles(reallocation);
reallocation = Reallocation { banks };
Ok((unique_cycles(reallocation.skip(cycles - 1)) - 1).to_string())
}
#[allow(dead_code)]
fn unique_cycles<R: Iterator<Item = Vec<usize>>>(reallocation: R) -> usize {
let mut seen = HashSet::new();
for (i, banks) in reallocation.enumerate() {
if seen.contains(&banks) {
return i + 1;
}
seen.insert(banks.clone());
}
unreachable!();
}
#[test]
fn test_part_one() {
let reallocation = Reallocation {
banks: vec![0, 2, 7, 0],
};
assert_eq!(unique_cycles(reallocation), 5);
}
#[allow(dead_code)]
struct Reallocation {
banks: Vec<usize>,
}
impl Iterator for Reallocation {
type Item = Vec<usize>;
fn next(&mut self) -> Option<Self::Item> {
let banks = self.banks.clone();
let mut banks: Vec<_> = banks.iter().enumerate().collect();
banks.reverse();
let (start, max) = banks
.iter()
.max_by_key(|&&(_, x)| x)
.map(|&(i, x)| (i, *x))?;
let len = self.banks.len();
self.banks[start] = 0;
for i in 1..=max {
self.banks[(start + i) % len] += 1;
}
Some(self.banks.clone())
}
}
#[test]
fn test_reallocation() {
let mut r = Reallocation {
banks: vec![0, 2, 7, 0],
};
assert_eq!(r.next(), Some(vec![2, 4, 1, 2]));
assert_eq!(r.next(), Some(vec![3, 1, 2, 3]));
assert_eq!(r.next(), Some(vec![0, 2, 3, 4]));
}

46
2017/rust/src/day_15.rs
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@ -1,46 +0,0 @@
use failure::*;
use regex::Regex;
#[allow(dead_code)]
pub fn solve(input: &str) -> Result<String, Error> {
let re: Regex = Regex::new(r"\d+")?;
let matches: Vec<_> = re.find_iter(input)
.map(|x| x.as_str())
.map(str::parse)
.collect::<Result<_, _>>()?;
let a_start = matches[0];
let b_start = matches[1];
// let a_start = 679;
// let b_start = 771;
let a = Generator {
value: a_start,
factor: 16_807,
};
let b = Generator {
value: b_start,
factor: 48_271,
};
let answer = a.filter(|a| a % 4 == 0)
.zip(b.filter(|b| b % 8 == 0))
.take(5_000_000)
.filter(|&(a, b)| a & 0b1111_1111_1111_1111 == b & 0b1111_1111_1111_1111)
.count();
Ok(answer.to_string())
}
struct Generator {
value: usize,
factor: usize,
}
impl Iterator for Generator {
type Item = usize;
fn next(&mut self) -> Option<Self::Item> {
self.value *= self.factor;
self.value %= 2_147_483_647;
Some(self.value)
}
}

127
2017/rust/src/day_16.rs
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@ -1,127 +0,0 @@
use std::collections::HashMap;
use std::convert::TryFrom;
use failure::*;
use regex::Regex;
pub fn solve(input: &str) -> Result<String, Error> {
// let input = "s1,x3/4,pe/b";
let moves = input
.split(',')
.map(Move::try_from)
.collect::<Result<_, _>>()?;
let programs = (b'a'..=b'p').map(|c| c as char).collect();
let dance = Dance { moves, programs };
// dance.next();
// Ok(dance.next().unwrap().iter().collect::<String>())
let history = dance
.enumerate()
.scan(HashMap::new(), |state, (i, programs)| {
if state.contains_key(&programs) {
None
} else {
state.insert(programs, i);
Some(state.clone())
}
})
.last()
.unwrap();
let index = 1_000_000_000 % history.len();
Ok(history
.iter()
.find(|(_, &v)| v == &index)
.map(|(k, _)| k)
.unwrap()
.iter()
.collect())
}
struct Dance {
moves: Vec<Move>,
programs: Vec<char>,
}
impl Iterator for Dance {
type Item = Vec<char>;
fn next(&mut self) -> Option<Self::Item> {
let item = self.programs.clone();
for m in &self.moves {
match m {
Move::Spin(size) => {
let len = self.programs.len();
self.programs.rotate(len - size);
}
Move::Exchange(a, b) => {
self.programs.swap(*a, *b);
}
Move::Partner(a, b) => {
let a = self.programs.iter().position(|x| x == a).unwrap();
let b = self.programs.iter().position(|x| x == b).unwrap();
self.programs.swap(a, b);
}
}
}
Some(item)
}
}
#[test]
fn test_dance() {
let moves = vec![Move::Spin(1), Move::Exchange(3, 4), Move::Partner('e', 'b')];
let programs = (b'a'..=b'e').map(|c| c as char).collect();
let mut dance = Dance { moves, programs };
assert_eq!(dance.next().unwrap(), vec!['a', 'b', 'c', 'd', 'e']);
assert_eq!(dance.next().unwrap(), vec!['b', 'a', 'e', 'd', 'c']);
}
#[derive(Debug, Eq, PartialEq)]
enum Move {
Spin(usize),
Exchange(usize, usize),
Partner(char, char),
}
lazy_static! {
static ref RE_S: Regex = { Regex::new(r"s(\d+)").unwrap() };
static ref RE_X: Regex = { Regex::new(r"x(\d+)/(\d+)").unwrap() };
static ref RE_P: Regex = { Regex::new(r"p(\w)/(\w)").unwrap() };
}
impl<'a> TryFrom<&'a str> for Move {
type Error = Error;
fn try_from(value: &str) -> Result<Self, Self::Error> {
RE_S.captures(value)
.and_then(|c| {
let size = c.get(1).unwrap().as_str().parse().ok()?;
Some(Move::Spin(size))
})
.or_else(|| {
RE_X.captures(value).and_then(|c| {
let a = c.get(1).unwrap().as_str().parse().ok()?;
let b = c.get(2).unwrap().as_str().parse().ok()?;
Some(Move::Exchange(a, b))
})
})
.or_else(|| {
RE_P.captures(value).and_then(|c| {
let a = c.get(1).unwrap().as_str().chars().next()?;
let b = c.get(2).unwrap().as_str().chars().next()?;
Some(Move::Partner(a, b))
})
})
.ok_or_else(|| format_err!("invalid move: {}", value))
}
}
#[test]
fn test_move_try_from() {
assert_eq!(Move::try_from("s1").unwrap(), Move::Spin(1));
assert_eq!(Move::try_from("x3/4").unwrap(), Move::Exchange(3, 4));
assert_eq!(Move::try_from("pe/b").unwrap(), Move::Partner('e', 'b'));
}

37
2017/rust/src/main.rs
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@ -1,37 +0,0 @@
#![feature(conservative_impl_trait, inclusive_range_syntax, match_default_bindings, slice_rotate,
try_from)]
extern crate failure;
#[macro_use]
extern crate lazy_static;
extern crate regex;
extern crate time;
use std::io::{self, Read};
use failure::Error;
mod day_01;
mod day_02;
mod day_03;
mod day_04;
mod day_05;
mod day_06;
mod day_15;
mod day_16;
fn main() {
if let Err(e) = run() {
eprintln!("{}", e);
}
}
fn run() -> Result<(), Error> {
let mut input = String::new();
io::stdin().read_to_string(&mut input)?;
let solution = day_16::solve(&input)?;
println!("{}", solution);
Ok(())
}

8
2018/ruby/Gemfile
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@ -1,8 +0,0 @@
# frozen_string_literal: true
source "https://rubygems.org"
git_source(:github) {|repo_name| "https://github.com/#{repo_name}" }
gem "minitest"
gem "pry"

19
2018/ruby/Gemfile.lock
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@ -1,19 +0,0 @@
GEM
remote: https://rubygems.org/
specs:
coderay (1.1.2)
method_source (0.9.2)
minitest (5.11.3)
pry (0.12.2)
coderay (~> 1.1.0)
method_source (~> 0.9.0)
PLATFORMS
ruby
DEPENDENCIES
minitest
pry
BUNDLED WITH
1.17.1

8
2018/ruby/day_01.rb
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@ -1,8 +0,0 @@
require "set"
seen = Set.new
ARGF.read.lines.map(&:to_i).cycle.each.with_object([0]) do |i,n|
n[0] += i
p n[0] and exit if seen.include?(n[0])
seen << n[0]
end

11
2018/ruby/day_02.rb
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@ -1,11 +0,0 @@
a = ARGF.read.lines.map(&:chomp).map(&:chars)
# two = a.count {|i| i.any? {|x| i.count(x) == 2} }
# three = a.count {|i| i.any? {|x| i.count(x) == 3} }
# puts two * three
x,y = a.flat_map {|i|
a.select {|j|
i.zip(j).select {|a,b| a != b }.count == 1
}
}.map(&:join)
p x.chars.zip(y.chars).select {|a,b| a == b }.map(&:first).join

27
2018/ruby/day_03.rb
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@ -1,27 +0,0 @@
claims, fabric = ARGF
.read
.lines
.map(&:chomp)
.reject(&:empty?)
.each
.with_object([[], Hash.new {|h,k| h[k] = []}]) { |line, (claims, fabric)|
line =~ /^#(\d+) @ (\d+),(\d+): (\d+)x(\d+)$/
claim = $1.to_i
x = $2.to_i
y = $3.to_i
width = $4.to_i
height = $5.to_i
claims << claim
width.times {|dx|
height.times {|dy|
fabric[[y+dy, x+dx]] << claim
}
}
}
p claims.reject {|claim|
fabric.any? {|_,v|
v.length > 1 && v.include?(claim)
}
}

29
2018/ruby/day_04.rb
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@ -1,29 +0,0 @@
records = ARGF.read.chomp.lines.map(&:chomp).sort
# puts records
stats = Hash.new {|h,k| h[k] = [] }
guard = nil
fell_asleep_at = nil
records.each do |record|
if record =~ /\[\d{4}-\d{2}-\d{2} \d{2}:\d{2}\] Guard \#(\d+) begins shift/
guard = $1.to_i
elsif record =~ /\[\d{4}-\d{2}-\d{2} \d{2}:(\d{2})\] falls asleep/
fell_asleep_at = $1.to_i
elsif record =~ /\[\d{4}-\d{2}-\d{2} \d{2}:(\d{2})\] wakes up/
stats[guard].concat((fell_asleep_at...$1.to_i).to_a)
else
p record
end
end
stats.transform_values! {|v| v.group_by(&:itself).transform_values(&:count) }
# Part One
guard, minutes = stats.max_by {|_,v| v.values.sum }
minute = minutes.max_by(&:last).first
p guard * minute
# Part Two
guard, (minute, _) = stats.map {|k,v| [k, v.max_by(&:last)] }.max_by {|_,(_,v)| v }
p guard * minute

29
2018/ruby/day_05.rb
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@ -1,29 +0,0 @@
input = ARGF.read.chomp
REGEX = Regexp.new(
(?a..?z)
.map {|x| [x, x.upcase] }
.flat_map(&:permutation)
.flat_map(&:to_a)
.map(&:join)
.join(?|)
)
def react(polymer)
last = nil
until polymer == last
last = polymer
polymer = polymer.gsub(REGEX, "")
end
polymer
end
# Part One
# p react(input).size
# Part Two
p (?a..?z)
.map {|unit| input.gsub(/#{unit}/i, "") }
.map {|polymer| react(polymer) }
.map {|reacted| reacted.size }
.min

49
2018/ruby/day_06.rb
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@ -1,49 +0,0 @@
require "set"
coords = ARGF.read.chomp.lines.map(&:chomp).map {|line| line.split(", ").map(&:to_i) }
x_min = coords.map(&:first).min
x_max = coords.map(&:first).max
y_min = coords.map(&:last).min
y_max = coords.map(&:last).max
coords = coords.map.with_index {|c,i| [i, c] }
p coords
p x_min, x_max, y_min, y_max
def manhattan_distance(a, b)
(a[0] - b[0]).abs + (a[1] - b[1]).abs
end
grid = {}
(x_min..x_max).each do |x|
(y_min..y_max).each do |y|
# Part One
# distances = coords.map {|id, coord|
# [id, manhattan_distance(coord, [x,y])]
# }
# min_distance = distances.map(&:last).min
# closests = distances.select {|_,distance| distance == min_distance }
# grid[[x,y]] = closests.length > 1 ? nil : closests.first.first
# Part Two
total_distance = coords.map {|_,coord| manhattan_distance(coord, [x,y]) }.sum
grid[[x,y]] = true if total_distance < 10000
end
end
# Part One
# infinites = Set.new
# (x_min..x_max).each do |x|
# infinites << grid[[x,y_min]]
# infinites << grid[[x,y_max]]
# end
# (y_min..y_max).each do |y|
# infinites << grid[[x_min,y]]
# infinites << grid[[x_max,y]]
# end
# p grid.values.group_by(&:itself).transform_values(&:count).reject {|k,_| infinites.include?(k) }.max_by(&:last)
p grid.size

33
2018/ruby/day_08.rb
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@ -1,33 +0,0 @@
class Node
def self.from(raw)
child_count = raw.shift
metadata_count = raw.shift
children = child_count.times.map { Node.from(raw) }
metadata = metadata_count.times.map { raw.shift }
Node.new(children, metadata)
end
def initialize(children, metadata)
@children, @metadata = children, metadata
end
def checksum
@metadata.sum + @children.map(&:checksum).sum
end
def value
if @children.empty?
@metadata.sum
else
@metadata.flat_map {|index|
@children.fetch(index-1, [])
}.map(&:value).sum
end
end
end
raw = ARGF.read.chomp.split(/\s+/).map(&:to_i)
root = Node.from(raw)
p root.value

45
2018/ruby/day_09.rb
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@ -1,45 +0,0 @@
Node = Struct.new(*%i[ value next prev ]) do
def to_s
out = [value]
current = self
loop do
current = current.next
break if current == self
out << current.value
end
out.join(" ")
end
end
ARGF.read.chomp =~ /(\d+) players; last marble is worth (\d+) points/
num_players = $1.to_i
num_marbles = $2.to_i * 100
current = Node.new(0, nil, nil)
current.next = current.prev = current
current_player = 0
scores = Array.new(num_players, 0)
(1...num_marbles).each do |marble|
if marble % 23 == 0
scores[current_player] += marble
7.times { current = current.prev }
scores[current_player] += current.value
current.next.prev = current.prev
current.prev.next = current.next
current = current.next
else
current = current.next
current.next = Node.new(marble, current.next, current)
current = current.next
current.next.prev = current
end
# puts "[#{current_player + 1}] #{current}"
puts marble if marble % 100000 == 0
current_player = (current_player + 1) % num_players
end
p scores.max

379
2018/ruby/day_10.rb
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@ -1,379 +0,0 @@
Point = Struct.new(*%i[position velocity])
points = <<~POINTS
position=< 21992, -10766> velocity=<-2, 1>
position=<-43366, -21661> velocity=< 4, 2>
position=<-10714, -21661> velocity=< 1, 2>
position=< 21993, 32773> velocity=<-2, -3>
position=< 43745, 32772> velocity=<-4, -3>
position=< 43742, 43664> velocity=<-4, -4>
position=<-43327, 43662> velocity=< 4, -4>
position=<-43373, 43655> velocity=< 4, -4>
position=<-10677, 32773> velocity=< 1, -3>
position=<-43324, 43664> velocity=< 4, -4>
position=<-32447, 43664> velocity=< 3, -4>
position=< 21946, -54317> velocity=<-2, 5>
position=< 11051, -10772> velocity=<-1, 1>
position=< 32824, -21652> velocity=<-3, 2>
position=< 11092, -21655> velocity=<-1, 2>
position=< 32863, 11002> velocity=<-3, -1>
position=<-21562, 10997> velocity=< 2, -1>
position=<-10725, 43662> velocity=< 1, -4>
position=< 11074, 11006> velocity=<-1, -1>
position=<-54209, -10768> velocity=< 5, 1>
position=< 43710, -10774> velocity=<-4, 1>
position=< 54615, 54544> velocity=<-5, -5>
position=< 32859, -21659> velocity=<-3, 2>
position=< 11052, 10997> velocity=<-1, -1>
position=< 21957, -32542> velocity=<-2, 3>
position=<-10714, 10997> velocity=< 1, -1>
position=< 32847, -21652> velocity=<-3, 2>
position=<-21561, -32547> velocity=< 2, 3>
position=< 11074, 21887> velocity=<-1, -2>
position=<-43339, -21656> velocity=< 4, 2>
position=< 54643, 54541> velocity=<-5, -5>
position=<-32477, -32547> velocity=< 3, 3>
position=<-21571, 11005> velocity=< 2, -1>
position=<-10701, -54314> velocity=< 1, 5>
position=<-21584, -43429> velocity=< 2, 4>
position=<-21595, -32542> velocity=< 2, 3>
position=< 54594, 21887> velocity=<-5, -2>
position=< 21970, 32774> velocity=<-2, -3>
position=<-54237, -43425> velocity=< 5, 4>
position=< 43732, -54319> velocity=<-4, 5>
position=<-32488, -10766> velocity=< 3, 1>
position=<-32473, -43433> velocity=< 3, 4>
position=<-43370, 10998> velocity=< 4, -1>
position=<-43347, 32777> velocity=< 4, -3>
position=<-32460, 11002> velocity=< 3, -1>
position=< 21962, -21659> velocity=<-2, 2>
position=< 21981, 21889> velocity=<-2, -2>
position=<-32437, -21656> velocity=< 3, 2>
position=<-43347, -21653> velocity=< 4, 2>
position=< 54652, 54541> velocity=<-5, -5>
position=<-21606, -54319> velocity=< 2, 5>
position=< 11055, 54549> velocity=<-1, -5>
position=<-54259, 21892> velocity=< 5, -2>
position=< 54636, 32777> velocity=<-5, -3>
position=<-54224, 11006> velocity=< 5, -1>
position=<-10723, -54310> velocity=< 1, 5>
position=< 32856, 54547> velocity=<-3, -5>
position=< 11052, 11006> velocity=<-1, -1>
position=<-10674, -54319> velocity=< 1, 5>
position=< 11071, -54317> velocity=<-1, 5>
position=< 11075, 54541> velocity=<-1, -5>
position=<-54226, 21888> velocity=< 5, -2>
position=< 21962, 32774> velocity=<-2, -3>
position=<-54251, 21883> velocity=< 5, -2>
position=< 54628, -32540> velocity=<-5, 3>
position=< 11087, 32770> velocity=<-1, -3>
position=< 54594, 43659> velocity=<-5, -4>
position=< 43748, 32778> velocity=<-4, -3>
position=< 32854, 32778> velocity=<-3, -3>
position=< 54639, -32542> velocity=<-5, 3>
position=<-43367, -43425> velocity=< 4, 4>
position=< 54651, -21660> velocity=<-5, 2>
position=< 11087, 10999> velocity=<-1, -1>
position=<-43379, 32778> velocity=< 4, -3>
position=< 43737, -32543> velocity=<-4, 3>
position=<-43382, 43655> velocity=< 4, -4>
position=<-10684, -43433> velocity=< 1, 4>
position=<-54250, 54550> velocity=< 5, -5>
position=< 11095, -21657> velocity=<-1, 2>
position=< 32836, 10997> velocity=<-3, -1>
position=<-54209, -32540> velocity=< 5, 3>
position=< 11050, 21892> velocity=<-1, -2>
position=<-21587, 10999> velocity=< 2, -1>
position=< 43725, 54550> velocity=<-4, -5>
position=<-54221, 32771> velocity=< 5, -3>
position=< 11087, 54546> velocity=<-1, -5>
position=< 11088, -32538> velocity=<-1, 3>
position=< 21986, -10774> velocity=<-2, 1>
position=< 11071, 10998> velocity=<-1, -1>
position=< 54631, 43661> velocity=<-5, -4>
position=<-32462, 21892> velocity=< 3, -2>
position=<-32464, -43433> velocity=< 3, 4>
position=<-32485, -10772> velocity=< 3, 1>
position=< 43707, 21888> velocity=<-4, -2>
position=< 54602, -32538> velocity=<-5, 3>
position=<-43335, -32546> velocity=< 4, 3>
position=< 54639, -10769> velocity=<-5, 1>
position=<-21551, -21656> velocity=< 2, 2>
position=<-43323, -21658> velocity=< 4, 2>
position=< 43718, 32770> velocity=<-4, -3>
position=<-10709, 43662> velocity=< 1, -4>
position=< 43749, 10997> velocity=<-4, -1>
position=< 32859, 11002> velocity=<-3, -1>
position=< 32839, -43433> velocity=<-3, 4>
position=< 21975, -10775> velocity=<-2, 1>
position=< 11088, 11006> velocity=<-1, -1>
position=<-10716, 21892> velocity=< 1, -2>
position=<-21560, -32538> velocity=< 2, 3>
position=<-21591, 54541> velocity=< 2, -5>
position=< 21968, -21661> velocity=<-2, 2>
position=<-21579, -32545> velocity=< 2, 3>
position=<-10721, -32547> velocity=< 1, 3>
position=<-32468, -43430> velocity=< 3, 4>
position=<-54260, -43427> velocity=< 5, 4>
position=<-43333, 10997> velocity=< 4, -1>
position=<-21579, 21884> velocity=< 2, -2>
position=<-43343, 54545> velocity=< 4, -5>
position=<-10708, -43424> velocity=< 1, 4>
position=< 54601, -21661> velocity=<-5, 2>
position=<-32460, -21654> velocity=< 3, 2>
position=< 32848, -10770> velocity=<-3, 1>
position=<-54209, 21886> velocity=< 5, -2>
position=< 32844, 32773> velocity=<-3, -3>
position=< 32839, 32778> velocity=<-3, -3>
position=<-43374, -43427> velocity=< 4, 4>
position=< 32827, 43662> velocity=<-3, -4>
position=<-21583, -43433> velocity=< 2, 4>
position=< 32819, -54311> velocity=<-3, 5>
position=<-43371, 43655> velocity=< 4, -4>
position=<-32437, 10997> velocity=< 3, -1>
position=<-21566, 43664> velocity=< 2, -4>
position=<-43371, -21658> velocity=< 4, 2>
position=< 43707, -32542> velocity=<-4, 3>
position=<-21551, 11003> velocity=< 2, -1>
position=<-21599, 11006> velocity=< 2, -1>
position=< 11057, 43660> velocity=<-1, -4>
position=<-21571, -10773> velocity=< 2, 1>
position=< 54609, -43424> velocity=<-5, 4>
position=<-32473, -54311> velocity=< 3, 5>
position=<-21587, -54310> velocity=< 2, 5>
position=<-43370, -54310> velocity=< 4, 5>
position=< 54627, 21883> velocity=<-5, -2>
position=< 54620, 32777> velocity=<-5, -3>
position=<-32473, -54316> velocity=< 3, 5>
position=< 54615, 21892> velocity=<-5, -2>
position=<-21579, -54313> velocity=< 2, 5>
position=<-43370, -21652> velocity=< 4, 2>
position=<-10709, -54313> velocity=< 1, 5>
position=< 43737, 32777> velocity=<-4, -3>
position=< 32843, 11000> velocity=<-3, -1>
position=<-43383, -32547> velocity=< 4, 3>
position=<-43359, 43661> velocity=< 4, -4>
position=<-10720, -43433> velocity=< 1, 4>
position=< 54620, 32772> velocity=<-5, -3>
position=< 43739, 21892> velocity=<-4, -2>
position=< 54615, 43656> velocity=<-5, -4>
position=<-32471, 32769> velocity=< 3, -3>
position=<-54232, 21884> velocity=< 5, -2>
position=< 11107, -10769> velocity=<-1, 1>
position=<-43383, 21890> velocity=< 4, -2>
position=< 21951, 54550> velocity=<-2, -5>
position=< 43747, -21661> velocity=<-4, 2>
position=<-32494, -43433> velocity=< 3, 4>
position=<-21563, -54316> velocity=< 2, 5>
position=<-54224, 11002> velocity=< 5, -1>
position=<-43372, -32538> velocity=< 4, 3>
position=<-43342, -21652> velocity=< 4, 2>
position=< 11079, 54548> velocity=<-1, -5>
position=< 11106, -32538> velocity=<-1, 3>
position=<-32488, -54310> velocity=< 3, 5>
position=< 43748, 43664> velocity=<-4, -4>
position=< 11063, 43658> velocity=<-1, -4>
position=<-54240, 54543> velocity=< 5, -5>
position=< 21983, 43655> velocity=<-2, -4>
position=<-21551, 32773> velocity=< 2, -3>
position=<-21607, -32547> velocity=< 2, 3>
position=<-10709, -54315> velocity=< 1, 5>
position=< 21978, 32775> velocity=<-2, -3>
position=< 32864, -21653> velocity=<-3, 2>
position=<-32464, 43655> velocity=< 3, -4>
position=< 32848, -54312> velocity=<-3, 5>
position=< 54639, 32772> velocity=<-5, -3>
position=<-43380, -21657> velocity=< 4, 2>
position=<-43371, 54544> velocity=< 4, -5>
position=< 11079, -43429> velocity=<-1, 4>
position=< 11099, 43664> velocity=<-1, -4>
position=< 54591, -21653> velocity=<-5, 2>
position=<-10715, -54310> velocity=< 1, 5>
position=< 21949, -10768> velocity=<-2, 1>
position=<-21606, 43657> velocity=< 2, -4>
position=<-54256, -21660> velocity=< 5, 2>
position=<-54242, -54319> velocity=< 5, 5>
position=< 21985, -21661> velocity=<-2, 2>
position=<-32465, -32542> velocity=< 3, 3>
position=<-54250, -43433> velocity=< 5, 4>
position=< 43742, 11005> velocity=<-4, -1>
position=<-32494, -10775> velocity=< 3, 1>
position=< 32843, 11004> velocity=<-3, -1>
position=<-21586, 43664> velocity=< 2, -4>
position=<-10723, 21883> velocity=< 1, -2>
position=<-21552, -43433> velocity=< 2, 4>
position=<-43358, -10775> velocity=< 4, 1>
position=< 32872, -10774> velocity=<-3, 1>
position=<-10680, -54312> velocity=< 1, 5>
position=<-54237, -32545> velocity=< 5, 3>
position=< 54651, 10997> velocity=<-5, -1>
position=<-32489, -43425> velocity=< 3, 4>
position=<-54243, -43429> velocity=< 5, 4>
position=< 54626, -54314> velocity=<-5, 5>
position=< 11107, -21656> velocity=<-1, 2>
position=<-21575, 10997> velocity=< 2, -1>
position=< 43716, 11001> velocity=<-4, -1>
position=<-10720, 32771> velocity=< 1, -3>
position=< 11092, 43660> velocity=<-1, -4>
position=< 54631, -21658> velocity=<-5, 2>
position=< 11068, 11005> velocity=<-1, -1>
position=< 43708, -21652> velocity=<-4, 2>
position=<-10674, -32538> velocity=< 1, 3>
position=< 11051, 11006> velocity=<-1, -1>
position=< 11063, -54316> velocity=<-1, 5>
position=< 11056, 32769> velocity=<-1, -3>
position=<-21587, 21884> velocity=< 2, -2>
position=< 11082, 43660> velocity=<-1, -4>
position=< 43726, 43663> velocity=<-4, -4>
position=< 54633, 54550> velocity=<-5, -5>
position=< 11071, 43663> velocity=<-1, -4>
position=<-43367, 43660> velocity=< 4, -4>
position=<-21563, 11004> velocity=< 2, -1>
position=< 54639, 54542> velocity=<-5, -5>
position=< 32848, -32541> velocity=<-3, 3>
position=<-54209, 54543> velocity=< 5, -5>
position=<-43370, 21892> velocity=< 4, -2>
position=< 54627, -21661> velocity=<-5, 2>
position=< 54612, 54542> velocity=<-5, -5>
position=< 11103, 43663> velocity=<-1, -4>
position=< 32876, 21892> velocity=<-3, -2>
position=< 21978, -21660> velocity=<-2, 2>
position=< 54592, 54547> velocity=<-5, -5>
position=<-43354, -43428> velocity=< 4, 4>
position=< 54615, 11001> velocity=<-5, -1>
position=<-10665, -43430> velocity=< 1, 4>
position=<-21566, -10766> velocity=< 2, 1>
position=< 43753, -43431> velocity=<-4, 4>
position=< 43739, -32547> velocity=<-4, 3>
position=<-43354, -43425> velocity=< 4, 4>
position=<-10669, -21654> velocity=< 1, 2>
position=< 54644, -10767> velocity=<-5, 1>
position=< 54612, -43432> velocity=<-5, 4>
position=< 32829, 54546> velocity=<-3, -5>
position=< 54594, -10766> velocity=<-5, 1>
position=< 54626, -32547> velocity=<-5, 3>
position=<-32441, 11004> velocity=< 3, -1>
position=< 43738, 11006> velocity=<-4, -1>
position=<-43351, -32541> velocity=< 4, 3>
position=< 43732, -10766> velocity=<-4, 1>
position=< 43749, 32777> velocity=<-4, -3>
position=<-32460, -21656> velocity=< 3, 2>
position=< 54628, 10998> velocity=<-5, -1>
position=< 21949, 32777> velocity=<-2, -3>
position=<-43370, -21661> velocity=< 4, 2>
position=<-10682, -43433> velocity=< 1, 4>
position=<-32441, -10767> velocity=< 3, 1>
position=< 21973, 21888> velocity=<-2, -2>
position=< 21973, 11000> velocity=<-2, -1>
position=< 11107, -10771> velocity=<-1, 1>
position=<-10680, -10769> velocity=< 1, 1>
position=< 32867, 54542> velocity=<-3, -5>
position=<-10701, 21887> velocity=< 1, -2>
position=<-54250, -10775> velocity=< 5, 1>
position=< 54615, -10768> velocity=<-5, 1>
position=<-21550, 21883> velocity=< 2, -2>
position=<-43346, 21890> velocity=< 4, -2>
position=<-54216, -54318> velocity=< 5, 5>
position=<-43357, 11006> velocity=< 4, -1>
position=<-10692, -10766> velocity=< 1, 1>
position=< 21944, 21892> velocity=<-2, -2>
position=< 54623, -10772> velocity=<-5, 1>
position=< 43749, 43663> velocity=<-4, -4>
position=< 43740, 21888> velocity=<-4, -2>
position=<-54224, 32776> velocity=< 5, -3>
position=<-54240, 43657> velocity=< 5, -4>
position=<-21592, -54310> velocity=< 2, 5>
position=< 54599, 21883> velocity=<-5, -2>
position=< 32830, -10771> velocity=<-3, 1>
position=< 21961, 54550> velocity=<-2, -5>
position=<-54258, -32543> velocity=< 5, 3>
position=< 11047, -10768> velocity=<-1, 1>
position=< 11047, -21653> velocity=<-1, 2>
position=< 43709, 21883> velocity=<-4, -2>
position=< 43729, -10766> velocity=<-4, 1>
position=<-32481, -54317> velocity=< 3, 5>
position=<-32481, -54318> velocity=< 3, 5>
position=< 43750, -54311> velocity=<-4, 5>
position=<-43325, 11006> velocity=< 4, -1>
position=<-43331, 21892> velocity=< 4, -2>
position=< 32867, -54311> velocity=<-3, 5>
position=< 32847, -10771> velocity=<-3, 1>
position=< 43731, 43664> velocity=<-4, -4>
position=< 21965, -10770> velocity=<-2, 1>
position=<-43362, 21884> velocity=< 4, -2>
position=< 43742, 43663> velocity=<-4, -4>
position=< 54634, 54541> velocity=<-5, -5>
position=<-32437, 10999> velocity=< 3, -1>
position=< 54631, -21654> velocity=<-5, 2>
position=<-54220, 11006> velocity=< 5, -1>
position=< 54607, 54546> velocity=<-5, -5>
position=<-43342, 43655> velocity=< 4, -4>
position=< 21973, 32773> velocity=<-2, -3>
position=<-32496, -32538> velocity=< 3, 3>
position=< 54599, -21652> velocity=<-5, 2>
position=<-54267, 54541> velocity=< 5, -5>
position=< 21949, -10768> velocity=<-2, 1>
position=< 11071, -10773> velocity=<-1, 1>
position=< 32879, 54549> velocity=<-3, -5>
position=<-43351, -54316> velocity=< 4, 5>
position=<-54237, 10999> velocity=< 5, -1>
position=<-54245, 32774> velocity=< 5, -3>
position=<-43375, 54549> velocity=< 4, -5>
position=< 54623, -21658> velocity=<-5, 2>
position=<-43375, 32778> velocity=< 4, -3>
position=<-21551, -21660> velocity=< 2, 2>
position=< 43741, -21656> velocity=<-4, 2>
position=<-54240, 32775> velocity=< 5, -3>
position=< 21984, -10766> velocity=<-2, 1>
position=<-10720, -21659> velocity=< 1, 2>
position=< 32824, 32770> velocity=<-3, -3>
position=< 11057, 32774> velocity=<-1, -3>
position=<-21561, 54550> velocity=< 2, -5>
position=< 11071, -21653> velocity=<-1, 2>
position=<-32497, -54310> velocity=< 3, 5>
position=< 32871, 43655> velocity=<-3, -4>
position=<-43371, 32778> velocity=< 4, -3>
position=<-21582, -54318> velocity=< 2, 5>
position=< 11076, -21658> velocity=<-1, 2>
position=< 43749, 43655> velocity=<-4, -4>
position=< 43754, -54319> velocity=<-4, 5>
POINTS
points = points.chomp.lines.map(&:chomp).map {|line|
line =~ /position=<\s*(-?\d+),\s*(-?\d+)> velocity=<\s*(-?\d+),\s*(-?\d+)>/
Point.new([$1, $2].map(&:to_i), [$3, $4].map(&:to_i))
}
def print_points(points)
min_x = points.map(&:position).map(&:first).min
max_x = points.map(&:position).map(&:first).max
min_y = points.map(&:position).map(&:last).min
max_y = points.map(&:position).map(&:last).max
# return if max_x - min_x > 500
return if max_y - min_y > 10
h = points.each.with_object(Hash.new(?.)) {|point, h|
h[point.position] = ?#
}
(min_y..max_y).each {|y|
(min_x..max_x).each {|x|
print h[[x,y]]
}
puts
}
gets
end
i = 0
loop do
print_points(points)
puts i
points.each {|point|
point.position[0] += point.velocity[0]
point.position[1] += point.velocity[1]
}
i += 1
end

38
2018/ruby/day_11.rb
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INPUT = ARGF.read.chomp.to_i
FuelCell = Struct.new(*%i[ x y ]) do
def rack_id
x + 10
end
def power_level
power_level = rack_id * y
power_level += INPUT
power_level *= rack_id
power_level = power_level / 100 % 10
power_level -= 5
power_level
end
end
grid = Hash.new(0)
(1..300).each do |x|
(1..300).each do |y|
grid[[x,y]] = FuelCell.new(x, y).power_level
end
end
squares = Hash.new(0)
(1..300).each do |size|
(1..(300-size+1)).each {|x|
(1..(300-size+1)).each {|y|
deltas = (0...size).flat_map {|d| [[size-1, d], [d, size-1]] }
squares[[x,y,size]] = squares[[x,y,size-1]] + deltas.map {|(dx,dy)| grid[[x+dx, y+dy]] }.sum - grid[[x+size-1, y+size-1]]
}
}
puts "#{size}: #{squares.max_by(&:last)}"
squares.delete_if {|(_,_,s)| s < size }
end

123
2018/ruby/day_13.rb
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Cart = Struct.new(*%i[ x y dir turns ])
map = ARGF.read.chomp.lines.map(&:chomp).map(&:chars)
carts = []
map.each.with_index {|row,y|
row.each.with_index {|i,x|
carts << Cart.new(x, y, i, 0) if %w[ ^ v < > ].include?(i)
}
}
loop do
carts.sort_by {|cart|
[cart.y, cart.x]
}.each do |cart|
case cart.dir
when ?^
cart.y -= 1
crashes = carts.select {|candidate| candidate.x == cart.x && candidate.y == cart.y }
carts.delete_if {|candidate| crashes.include?(candidate) } if crashes.size > 1
case map[cart.y][cart.x]
when ?\\
cart.dir = ?<
when ?/
cart.dir = ?>
when ?+
case cart.turns % 3
when 0
cart.dir = ?<
when 1
when 2
cart.dir = ?>
end
cart.turns += 1
end
when ?v
cart.y += 1
crashes = carts.select {|candidate| candidate.x == cart.x && candidate.y == cart.y }
carts.delete_if {|candidate| crashes.include?(candidate) } if crashes.size > 1
case map[cart.y][cart.x]
when ?\\
cart.dir = ?>
when ?/
cart.dir = ?<
when ?+
case cart.turns % 3
when 0
cart.dir = ?>
when 1
when 2
cart.dir = ?<
end
cart.turns += 1
end
when ?<
cart.x -= 1
crashes = carts.select {|candidate| candidate.x == cart.x && candidate.y == cart.y }
carts.delete_if {|candidate| crashes.include?(candidate) } if crashes.size > 1
case map[cart.y][cart.x]
when ?\\
cart.dir = ?^
when ?/
cart.dir = ?v
when ?+
case cart.turns % 3
when 0
cart.dir = ?v
when 1
when 2
cart.dir = ?^
end
cart.turns += 1
end
when ?>
cart.x += 1
crashes = carts.select {|candidate| candidate.x == cart.x && candidate.y == cart.y }
carts.delete_if {|candidate| crashes.include?(candidate) } if crashes.size > 1
case map[cart.y][cart.x]
when ?\\
cart.dir = ?v
when ?/
cart.dir = ?^
when ?+
case cart.turns % 3
when 0
cart.dir = ?^
when 1
when 2
cart.dir = ?v
end
cart.turns += 1
end
end
# puts map.map.with_index {|row,y|
# row.map.with_index {|i,x|
# cart = carts.find {|cart| cart.x == x && cart.y == y }
# cart ? cart.dir : i
# }.join
# }.join("\n")
# puts
# crashes = Hash.new(0)
# carts.each {|cart| crashes[[cart.x, cart.y]] += 1 }
# crashes = crashes.select {|_,v| v > 1 }.map(&:first)
# crashes.each do |(x,y)|
# p x
# p y
# carts.delete_if {|cart| cart.x == x && cart.y == y }
# end
# if crashes.values.any? {|v| v > 1 }
# p crashes.find {|_,v| v > 1 }
# exit
# end
end
if carts.size == 1
p carts
exit
end
# p carts
# sleep 1
end

522
2018/ruby/day_15.rb
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@ -1,522 +0,0 @@
require "set"
require "minitest"
require "minitest/pride"
class EndCombat < StandardError; end
class Combat
def initialize(map, elf_attack)
@map = map
@attack = {
Elf => elf_attack,
Goblin => 3,
}
end
def fight
return enum_for(__method__) unless block_given?
yield @map
loop do
turn_order.each do |pos|
next if @map[pos].nil? # don't take a turn for units that just died
turn = Turn.new(@map, pos)
if move = turn.move
unit = @map.delete(pos)
@map[move] = unit
turn.pos = move
end
if attack = turn.attack
unit = @map.fetch(turn.pos)
target = @map.fetch(attack)
target.hp -= @attack.fetch(unit.class)
@map.delete(attack) if target.hp <= 0
end
end
yield @map
end
rescue EndCombat
# yield @map
end
def turn_order
@map.units.keys.sort
end
end
class TestCombat < Minitest::Test
def test_move
map = Map.parse(<<~MAP)
#########
#G..G..G#
#.......#
#.......#
#G..E..G#
#.......#
#.......#
#G..G..G#
#########
MAP
combat = Combat.new(map, 3)
rounds = combat.fight
rounds.next # skip the first round
assert_equal <<~MAP.chomp, rounds.next.to_s
#########
#.G...G.#
#...G...#
#...E..G#
#.G.....#
#.......#
#G..G..G#
#.......#
#########
MAP
assert_equal <<~MAP.chomp, rounds.next.to_s
#########
#..G.G..#
#...G...#
#.G.E.G.#
#.......#
#G..G..G#
#.......#
#.......#
#########
MAP
assert_equal <<~MAP.chomp, rounds.next.to_s
#########
#.......#
#..GGG..#
#..GEG..#
#G..G...#
#......G#
#.......#
#.......#
#########
MAP
end
def test_fight
map = Map.parse(<<~MAP)
#######
#.G...#
#...EG#
#.#.#G#
#..G#E#
#.....#
#######
MAP
combat = Combat.new(map, 3)
rounds = combat.fight
rounds.next # skip the initial state
rounds.next # skip the first found
map = rounds.next # second round
assert_equal 188, map.fetch(Position[2,4]).hp
20.times { rounds.next }
assert_equal <<~MAP.chomp, rounds.next.to_s
#######
#...G.#
#..G.G#
#.#.#G#
#...#E#
#.....#
#######
MAP
end
def test_turn_order
map = Map.parse(<<~MAP)
#######
#.G.E.#
#E.G.E#
#.G.E.#
#######
MAP
combat = Combat.new(map, 3)
expected = [[1,2], [1,4], [2,1], [2,3], [2,5], [3,2], [3,4]].map {|pos| Position[*pos]}
assert_equal expected, combat.turn_order
end
end
class Turn
attr_accessor :pos
def initialize(map, pos)
@map, @pos = map, pos
@unit = @map.fetch(@pos)
end
def move
raise EndCombat if targets.empty?
return if can_attack?
return if nearest.empty?
chosen = nearest.min
haystack = @map.in_range(@pos)
dijkstra(chosen)
.select {|pos,_| haystack.include?(pos) }
.min_by {|pos,distance| [distance, pos] }
.first
end
def attack
attackable.min_by {|pos, target| [target.hp, pos] }&.first
end
def targets
@map.units.select {|_, other| other.is_a?(@unit.enemy) }
end
def attackable
targets.select {|pos, _| @pos.adjacent.include?(pos) }
end
def can_attack?
!attackable.empty?
end
def in_range
targets.flat_map {|pos, _| @map.in_range(pos) }.uniq
end
def reachable
dijkstra(@pos).select {|pos,_| in_range.include?(pos) }
end
def nearest
nearest = Hash.new {|h,k| h[k] = [] }
reachable.each do |pos, distance|
nearest[distance] << pos
end
return [] if nearest.empty?
nearest.min_by(&:first).last
end
private
def dijkstra(pos)
distances = { pos => 0 }
queue = [ pos ]
while pos = queue.shift
distance = distances.fetch(pos) + 1
@map.in_range(pos).reject {|pos| distances.has_key?(pos) }.each do |pos|
distances[pos] = distance
queue << pos
end
end
distances
end
end
class TestTurn < Minitest::Test
def setup
map = Map.parse(<<~MAP)
#######
#E..G.#
#...#.#
#.G.#G#
#######
MAP
@turn = Turn.new(map, Position[1,1])
end
def test_targets
assert_equal [[1,4], [3,2], [3,5]].to_set, @turn.targets.keys.map(&:to_a).to_set
end
def test_in_range
assert_equal [[1,3], [1,5], [2,2], [2,5], [3,1], [3,3]].to_set, @turn.in_range.map(&:to_a).to_set
end
def test_reachable
assert_equal [[1,3], [2,2], [3,1], [3,3]].to_set, @turn.reachable.keys.map(&:to_a).to_set
end
def test_nearest
assert_equal [[1,3], [2,2], [3,1]].to_set, @turn.nearest.map(&:to_a).to_set
end
def test_move
assert_equal Position[1,2], @turn.move
turn = Turn.new(Map.parse(<<~MAP), Position[1,2])
#######
#.E...#
#.....#
#...G.#
#######
MAP
assert_equal Position[1,3], turn.move
end
end
class Map
def self.parse(s)
occupied = {}
s.chomp.lines.each.with_index do |row, y|
row.chomp.chars.each.with_index do |square, x|
case square
when ?#
occupied[Position[y, x]] = Wall.new
when ?E
occupied[Position[y, x]] = Elf.new
when ?G
occupied[Position[y, x]] = Goblin.new
when ?.
else
fail "Invalid character: #{square.inspect}"
end
end
end
self.new(occupied)
end
def initialize(occupied)
@occupied = occupied
end
def [](pos)
@occupied[pos]
end
def []=(pos, square)
@occupied[pos] = square
end
def fetch(pos)
@occupied.fetch(pos)
end
def delete(pos)
@occupied.delete(pos)
end
def units
@occupied.select {|_, sq| sq.is_a?(Unit) }
end
def in_range(pos)
pos
.adjacent
.reject {|pos| @occupied.has_key?(pos) }
end
def to_s
max_y = @occupied.keys.map(&:y).max
max_x = @occupied.keys.map(&:x).max
(0..max_y).map {|y|
(0..max_x).map {|x|
case @occupied[Position[y, x]]
when Wall
?#
when Elf
?E
when Goblin
?G
when nil
?.
else
fail "Unexpected object: #{@occupied[Position[y, x]]}"
end
}.join
}.join(?\n)
end
end
class TestMap < Minitest::Test
def test_parse
map = Map.parse(<<~MAP)
#######
#E..G.#
#...#.#
#.G.#G#
#######
MAP
assert_instance_of Wall, map[Position[0,0]]
assert_instance_of Wall, map[Position[2,4]]
assert_instance_of Wall, map[Position[4,6]]
assert_instance_of Elf, map[Position[1,1]]
assert_instance_of Goblin, map[Position[1,4]]
assert_instance_of Goblin, map[Position[3,5]]
assert_nil map[Position[1,2]]
assert_nil map[Position[2,5]]
end
def test_units
map = Map.parse(<<~MAP)
#######
#E..G.#
#...#.#
#.G.#G#
#######
MAP
assert_equal 4, map.units.length
end
end
Position = Struct.new(:y, :x) do
def self.[](y, x)
self.new(y, x)
end
def <=>(other)
[self.y, self.x] <=> [other.y, other.x]
end
def adjacent
[-1, 1]
.flat_map {|d| [[y, x+d], [y+d, x]] }
.map {|pos| Position[*pos] }
end
def to_a
[y, x]
end
def to_s
to_a.to_s
end
end
class Unit
attr_accessor :hp
def initialize
@hp = 200
end
def to_s
"#{self.class.name.chars.first}(#{hp})"
end
end
class Wall
end
class Elf < Unit
def enemy
Goblin
end
end
class Goblin < Unit
def enemy
Elf
end
end
def solve(input)
(3..Float::INFINITY).each do |elf_attack|
map = Map.parse(input)
outcome = simulate(map, elf_attack)
next if outcome.nil?
return outcome
end
end
def simulate(map, elf_attack)
elf_count = map.units.count {|_, unit| unit.is_a?(Elf) }
combat = Combat.new(map, elf_attack)
map, count = combat.fight.map.with_index
.inject(nil) {|last,(map,count)|
return if map.units.count {|_, unit| unit.is_a?(Elf) } < elf_count
# puts map, map.units.values.map(&:to_s).inspect
[map, count]
}
return if map.units.count {|_, unit| unit.is_a?(Elf) } < elf_count
map.units.values.map(&:hp).sum * count
end
class TestSolve < Minitest::Test
def test_solve
# assert_equal 27730, solve(<<~INPUT)
assert_equal 4988, solve(<<~INPUT)
#######
#.G...#
#...EG#
#.#.#G#
#..G#E#
#.....#
#######
INPUT
# assert_equal 36334, solve(<<~INPUT)
########
##G..#E#
##E#E.E#
##G.##.#
##...#E#
##...E.#
########
#INPUT
# assert_equal 39514, solve(<<~INPUT)
assert_equal 31284, solve(<<~INPUT)
#######
#E..EG#
#.#G.E#
#E.##E#
#G..#.#
#..E#.#
#######
INPUT
# assert_equal 27755, solve(<<~INPUT)
assert_equal 3478, solve(<<~INPUT)
#######
#E.G#.#
#.#G..#
#G.#.G#
#G..#.#
#...E.#
#######
INPUT
# assert_equal 28944, solve(<<~INPUT)
assert_equal 6474, solve(<<~INPUT)
#######
#.E...#
#.#..G#
#.###.#
#E#G#G#
#...#G#
#######
INPUT
# assert_equal 18740, solve(<<~INPUT)
assert_equal 1140, solve(<<~INPUT)
#########
#G......#
#.E.#...#
#..##..G#
#...##..#
#...#...#
#.G...G.#
#.....G.#
#########
INPUT
end
end
if __FILE__ == $0
require "minitest/autorun" and exit if ENV["TEST"]
puts solve(ARGF.read)
end

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2018/ruby/day_16.rb
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@ -1,99 +0,0 @@
require "minitest"
require "minitest/pride"
OPCODES = {
addr: ->(a, b, c) { ->(registers) { registers[c] = registers[a] + registers[b] } },
addi: ->(a, b, c) { ->(registers) { registers[c] = registers[a] + b } },
mulr: ->(a, b, c) { ->(registers) { registers[c] = registers[a] * registers[b] } },
muli: ->(a, b, c) { ->(registers) { registers[c] = registers[a] * b } },
banr: ->(a, b, c) { ->(registers) { registers[c] = registers[a] & registers[b] } },
bani: ->(a, b, c) { ->(registers) { registers[c] = registers[a] & b } },
borr: ->(a, b, c) { ->(registers) { registers[c] = registers[a] | registers[b] } },
bori: ->(a, b, c) { ->(registers) { registers[c] = registers[a] | b } },
setr: ->(a, b, c) { ->(registers) { registers[c] = registers[a] } },
seti: ->(a, b, c) { ->(registers) { registers[c] = a } },
gtir: ->(a, b, c) { ->(registers) { registers[c] = (a > registers[b]) ? 1 : 0 } },
gtri: ->(a, b, c) { ->(registers) { registers[c] = (registers[a] > b) ? 1 : 0 } },
gtrr: ->(a, b, c) { ->(registers) { registers[c] = (registers[a] > registers[b]) ? 1 : 0 } },
eqir: ->(a, b, c) { ->(registers) { registers[c] = (a == registers[b]) ? 1 : 0 } },
eqri: ->(a, b, c) { ->(registers) { registers[c] = (registers[a] == b) ? 1 : 0 } },
eqrr: ->(a, b, c) { ->(registers) { registers[c] = (registers[a] == registers[b]) ? 1 : 0 } },
}
class TestOpcodes < Minitest::Test
def test_mulr
registers = [3, 2, 1, 1]
OPCODES[:mulr].call(2, 1, 2).call(registers)
assert_equal [3, 2, 2, 1], registers
end
def test_addi
registers = [3, 2, 1, 1]
OPCODES[:addi].call(2, 1, 2).call(registers)
assert_equal [3, 2, 2, 1], registers
end
def test_seti
registers = [3, 2, 1, 1]
OPCODES[:seti].call(2, 1, 2).call(registers)
assert_equal [3, 2, 2, 1], registers
end
end
def solve(input)
samples = input.scan(/
Before:\s*((?~\n))\n
((?~\n))\n
After:\s*((?~\n))\n
/mx)
valid_opcodes = samples.map do |sample|
before = sample[0].scan(/\d+/).map(&:to_i)
instruction = sample[1].scan(/\d+/).map(&:to_i)
after = sample[2].scan(/\d+/).map(&:to_i)
opcode, *args = instruction
opcodes = OPCODES.select {|_, instruction|
registers = before.dup
instruction[*args][registers]
registers == after
}.map(&:first)
[opcode, opcodes]
end
# Part One
# return valid_opcodes.count {|_,opcodes| opcodes.length >= 3 }
opcode_map = {}
until opcode_map.length == OPCODES.length
number, opcodes = valid_opcodes.find {|_,opcodes| opcodes.length == 1 }
opcode = opcodes[0]
opcode_map[number] = opcode
valid_opcodes.delete_if {|n,_| n == number }
valid_opcodes.each do |_,opcodes|
opcodes.delete(opcode)
end
end
program = input[/[\d\s]+\Z/].lines.map {|line| line.scan(/\d+/).map(&:to_i) }.reject(&:empty?)
registers = [0, 0, 0, 0]
program.each do |instruction|
number, *args = instruction
opcode = opcode_map.fetch(number)
OPCODES.fetch(opcode)[*args][registers]
end
registers[0]
end
if __FILE__ == $0
require "minitest/autorun" and exit if ENV["TEST"]
puts solve(ARGF.read)
end

261
2018/ruby/day_17.rb
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@ -1,261 +0,0 @@
require "set"
require "minitest"
require "minitest/pride"
class Slice
def self.parse(s)
squares = {}
s.scan(/^(x|y)=(\d+), (?:x|y)=(\d+)..(\d+)$/m).each do |xy, i, min, max|
i, min, max = [i, min, max].map(&:to_i)
(min..max).map {|j| xy == ?x ? [i, j] : [j, i] }.each do |pos|
squares[pos] = ?#
end
end
new(squares)
end
attr_reader :squares
def initialize(squares)
@squares = squares
@squares[[500, 0]] = ?+
@active = Set[[500, 0]]
end
def simulate
return enum_for(__method__) unless block_given?
max_y = @squares.keys.map(&:last).max
loop do
@active.to_a.each do |pos|
@active.delete(pos)
x, y = pos
case @squares.fetch(pos)
when ?+
@squares[[x, y+1]] = ?|
@active << [x, y+1]
when ?|
next if y+1 > max_y
if @squares[[x, y+1]].nil?
@squares[[x, y+1]] = ?|
@active << [x, y+1]
else
if @squares[[x-1, y]].nil?
@squares[[x-1, y]] = ?|
@active << [x-1, y]
end
if @squares[[x+1, y]].nil?
@squares[[x+1, y]] = ?|
@active << [x+1, y]
end
left_x = x-1
left_x -= 1 until @squares[[left_x, y]] != ?|
right_x = x+1
right_x += 1 until @squares[[right_x, y]] != ?|
if @squares[[left_x, y]] == ?# && @squares[[right_x, y]] == ?#
(left_x+1..right_x-1).each do |x|
@squares[[x, y]] = ?~
@active << [x, y-1] if @squares[[x, y-1]] == ?|
end
end
end
end
end
return if @active.empty?
yield self
end
end
def water
@squares.select {|_, s| %w[ | ~ ].include?(s) }
end
def to_s
min_x, max_x = @squares.keys.map(&:first).minmax
min_y, max_y = @squares.keys.map(&:last).minmax
min_y = [0, min_y].min
(min_y..max_y).map {|y| (min_x-1..max_x+1).map {|x| @squares.fetch([x, y]) { ?. } }.join }.join(?\n)
end
end
class TestSlice < Minitest::Test
def setup
@slice = Slice.parse(<<~SLICE)
x=495, y=2..7
y=7, x=495..501
x=501, y=3..7
x=498, y=2..4
x=506, y=1..2
x=498, y=10..13
x=504, y=10..13
y=13, x=498..504
SLICE
end
def test_parse_to_s
assert_equal <<~SLICE.chomp, @slice.to_s
......+.......
............#.
.#..#.......#.
.#..#..#......
.#..#..#......
.#.....#......
.#.....#......
.#######......
..............
..............
....#.....#...
....#.....#...
....#.....#...
....#######...
SLICE
end
def test_simulate
simulation = @slice.simulate
5.times { simulation.next }
assert_equal <<~SLICE.chomp, @slice.to_s
......+.......
......|.....#.
.#..#.|.....#.
.#..#.|#......
.#..#.|#......
.#....|#......
.#.....#......
.#######......
..............
..............
....#.....#...
....#.....#...
....#.....#...
....#######...
SLICE
5.times { simulation.next }
assert_equal <<~SLICE.chomp, @slice.to_s
......+.......
......|.....#.
.#..#.|.....#.
.#..#.|#......
.#..#.|#......
.#....|#......
.#~~~~~#......
.#######......
..............
..............
....#.....#...
....#.....#...
....#.....#...
....#######...
SLICE
4.times { simulation.next }
assert_equal <<~SLICE.chomp, @slice.to_s
......+.......
......|.....#.
.#..#.|.....#.
.#..#.|#......
.#..#.|#......
.#~~~~~#......
.#~~~~~#......
.#######......
..............
..............
....#.....#...
....#.....#...
....#.....#...
....#######...
SLICE
2.times { simulation.next }
assert_equal <<~SLICE.chomp, @slice.to_s
......+.......
......|.....#.
.#..#.|.....#.
.#..#~~#......
.#..#~~#......
.#~~~~~#......
.#~~~~~#......
.#######......
..............
..............
....#.....#...
....#.....#...
....#.....#...
....#######...
SLICE
21.times { simulation.next }
assert_equal <<~SLICE.chomp, @slice.to_s
......+.......
......|.....#.
.#..#||||...#.
.#..#~~#|.....
.#..#~~#|.....
.#~~~~~#|.....
.#~~~~~#|.....
.#######|.....
........|.....
........|.....
....#~~~~~#...
....#~~~~~#...
....#~~~~~#...
....#######...
SLICE
9.times { simulation.next }
assert_equal <<~SLICE.chomp, @slice.to_s
......+.......
......|.....#.
.#..#||||...#.
.#..#~~#|.....
.#..#~~#|.....
.#~~~~~#|.....
.#~~~~~#|.....
.#######|.....
........|.....
...|||||||||..
...|#~~~~~#|..
...|#~~~~~#|..
...|#~~~~~#|..
...|#######|..
SLICE
assert_equal 57, @slice.water.count
end
end
def solve(input)
slice = Slice.parse(input)
min_y = slice.squares.select {|_,s| s == ?# }.map(&:first).map(&:last).min
simulation = slice.simulate
loop do
simulation.next
end
# puts
# min_x, max_x = slice.water.map(&:first).minmax
# min_y, max_y = slice.water.map(&:last).minmax
# min_y = [0, min_y].min
# puts (min_y..max_y).map {|y| (min_x-1..max_x+1).map {|x| slice.squares.fetch([x, y]) { ?. } }.join }.join(?\n)
# Part One
# slice.water.count {|(_,y),_| y >= min_y }
slice.water.count {|_,s| s == ?~ }
end
if __FILE__ == $0
require "minitest/autorun" and exit if ENV["TEST"]
puts solve(ARGF.read)
end

280
2018/ruby/day_18.rb
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@ -1,280 +0,0 @@
require "minitest"
require "minitest/pride"
class Area
def self.parse(input)
acres = input.chomp.lines.map {|row| row.chomp.chars.to_a }
new(acres)
end
attr_reader :acres
def initialize(acres)
@acres = acres
end
def changes
return enum_for(__method__) unless block_given?
loop do
yield self
acres = @acres.map.with_index {|row, y|
row.map.with_index {|acre, x|
adjacent = self.adjacent(x, y)
case self[x, y]
when ?.
(adjacent.count(?|) >= 3) ? ?| : ?.
when ?|
(adjacent.count(?#) >= 3) ? ?# : ?|
when ?#
(adjacent.count(?#) >= 1 && adjacent.count(?|) >= 1) ? ?# : ?.
else
fail "Unexpected acre: #{self[x, y]}"
end
}
}
@acres = acres
end
end
def to_s
@acres.map {|row| row.join }.join(?\n)
end
def [](x, y)
@acres.fetch(y).fetch(x)
end
def adjacent(x, y)
(-1..1).flat_map {|dx| (-1..1).map {|dy| [dx, dy] } }
.reject {|dx,dy| dx == 0 && dy == 0 }
.map {|dx, dy| [x+dx, y+dy] }
.reject {|x, y| x < 0 || y < 0 }
.map {|x, y|
@acres.fetch(y) { [] }.fetch(x) { nil }
}.compact
end
end
class TestArea < Minitest::Test
def test_area
area = Area.parse(<<~AREA)
.#.#...|#.
.....#|##|
.|..|...#.
..|#.....#
#.#|||#|#|
...#.||...
.|....|...
||...#|.#|
|.||||..|.
...#.|..|.
AREA
changes = area.changes
assert_equal <<~AREA.chomp, changes.next.to_s
.#.#...|#.
.....#|##|
.|..|...#.
..|#.....#
#.#|||#|#|
...#.||...
.|....|...
||...#|.#|
|.||||..|.
...#.|..|.
AREA
assert_equal <<~AREA.chomp, changes.next.to_s
.......##.
......|###
.|..|...#.
..|#||...#
..##||.|#|
...#||||..
||...|||..
|||||.||.|
||||||||||
....||..|.
AREA
assert_equal <<~AREA.chomp, changes.next.to_s
.......#..
......|#..
.|.|||....
..##|||..#
..###|||#|
...#|||||.
|||||||||.
||||||||||
||||||||||
.|||||||||
AREA
assert_equal <<~AREA.chomp, changes.next.to_s
.......#..
....|||#..
.|.||||...
..###|||.#
...##|||#|
.||##|||||
||||||||||
||||||||||
||||||||||
||||||||||
AREA
assert_equal <<~AREA.chomp, changes.next.to_s
.....|.#..
...||||#..
.|.#||||..
..###||||#
...###||#|
|||##|||||
||||||||||
||||||||||
||||||||||
||||||||||
AREA
assert_equal <<~AREA.chomp, changes.next.to_s
....|||#..
...||||#..
.|.##||||.
..####|||#
.|.###||#|
|||###||||
||||||||||
||||||||||
||||||||||
||||||||||
AREA
assert_equal <<~AREA.chomp, changes.next.to_s
...||||#..
...||||#..
.|.###|||.
..#.##|||#
|||#.##|#|
|||###||||
||||#|||||
||||||||||
||||||||||
||||||||||
AREA
assert_equal <<~AREA.chomp, changes.next.to_s
...||||#..
..||#|##..
.|.####||.
||#..##||#
||##.##|#|
|||####|||
|||###||||
||||||||||
||||||||||
||||||||||
AREA
assert_equal <<~AREA.chomp, changes.next.to_s
..||||##..
..|#####..
|||#####|.
||#...##|#
||##..###|
||##.###||
|||####|||
||||#|||||
||||||||||
||||||||||
AREA
assert_equal <<~AREA.chomp, changes.next.to_s
..||###...
.||#####..
||##...##.
||#....###
|##....##|
||##..###|
||######||
|||###||||
||||||||||
||||||||||
AREA
assert_equal <<~AREA.chomp, changes.next.to_s
.||##.....
||###.....
||##......
|##.....##
|##.....##
|##....##|
||##.####|
||#####|||
||||#|||||
||||||||||
AREA
end
end
def solve(input)
area = Area.parse(input)
changes = area.changes
# Part One
# 11.times do |i|
1000000001.times do |i|
changes.next
wooded = area.acres.flat_map(&:itself).count(?|)
lumberyards = area.acres.flat_map(&:itself).count(?#)
puts "#{i}: #{wooded * lumberyards}"
end
wooded = area.acres.flat_map(&:itself).count(?|)
lumberyards = area.acres.flat_map(&:itself).count(?#)
wooded * lumberyards
end
if __FILE__ == $0
require "minitest/autorun" and exit if ENV["TEST"]
puts solve(ARGF.read)
end
__END__
Here's the cycle, 28 minutes long:
1000000000 % 28 = 552 % 28
552 % 28 = 20
540: 223468
541: 227744
542: 226338
543: 221697
544: 214775
545: 206150
546: 200326
547: 197380
548: 177364
549: 177834
550: 176960
551: 176490
552: 174584
553: 177683
554: 176808
555: 176715
556: 177784
557: 182016
558: 182479
559: 188256
560: 194892
561: 199864
562: 206720
563: 210330
564: 212102
565: 212310
566: 215306
567: 217260

118
2018/ruby/day_19.rb
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require "minitest"
require "minitest/pride"
OPCODES = {
addr: ->(a, b, c) { ->(registers) { registers[c] = registers[a] + registers[b] } },
addi: ->(a, b, c) { ->(registers) { registers[c] = registers[a] + b } },
mulr: ->(a, b, c) { ->(registers) { registers[c] = registers[a] * registers[b] } },
muli: ->(a, b, c) { ->(registers) { registers[c] = registers[a] * b } },
banr: ->(a, b, c) { ->(registers) { registers[c] = registers[a] & registers[b] } },
bani: ->(a, b, c) { ->(registers) { registers[c] = registers[a] & b } },
borr: ->(a, b, c) { ->(registers) { registers[c] = registers[a] | registers[b] } },
bori: ->(a, b, c) { ->(registers) { registers[c] = registers[a] | b } },
setr: ->(a, b, c) { ->(registers) { registers[c] = registers[a] } },
seti: ->(a, b, c) { ->(registers) { registers[c] = a } },
gtir: ->(a, b, c) { ->(registers) { registers[c] = (a > registers[b]) ? 1 : 0 } },
gtri: ->(a, b, c) { ->(registers) { registers[c] = (registers[a] > b) ? 1 : 0 } },
gtrr: ->(a, b, c) { ->(registers) { registers[c] = (registers[a] > registers[b]) ? 1 : 0 } },
eqir: ->(a, b, c) { ->(registers) { registers[c] = (a == registers[b]) ? 1 : 0 } },
eqri: ->(a, b, c) { ->(registers) { registers[c] = (registers[a] == b) ? 1 : 0 } },
eqrr: ->(a, b, c) { ->(registers) { registers[c] = (registers[a] == registers[b]) ? 1 : 0 } },
}
class TestOpcodes < Minitest::Test
def test_mulr
registers = [3, 2, 1, 1]
OPCODES[:mulr].call(2, 1, 2).call(registers)
assert_equal [3, 2, 2, 1], registers
end
def test_addi
registers = [3, 2, 1, 1]
OPCODES[:addi].call(2, 1, 2).call(registers)
assert_equal [3, 2, 2, 1], registers
end
def test_seti
registers = [3, 2, 1, 1]
OPCODES[:seti].call(2, 1, 2).call(registers)
assert_equal [3, 2, 2, 1], registers
end
end
Instruction = Struct.new(:opcode, :args)
class Program
def self.parse(input)
lines = input.lines
ip = lines.shift[/^#ip (\d)+$/, 1].to_i
instructions = lines.map {|line|
opcode, *args = line.split
opcode = opcode.to_sym
args = args.map(&:to_i)
Instruction.new(opcode, args)
}
new(ip, instructions)
end
attr_reader :registers
def initialize(ip, instructions)
@ip, @instructions = ip, instructions
@registers = Array.new(6, 0)
end
def run
return enum_for(__method__) unless block_given?
while (0...@instructions.length).cover?(@registers[@ip])
instruction = @instructions.fetch(@registers[@ip])
OPCODES.fetch(instruction.opcode)[*instruction.args][@registers]
yield self
@registers[@ip] += 1
end
end
end
class TestProgram < Minitest::Test
def test_program
program = Program.parse(<<~PROGRAM)
#ip 0
seti 5 0 1
seti 6 0 2
addi 0 1 0
addr 1 2 3
setr 1 0 0
seti 8 0 4
seti 9 0 5
PROGRAM
run = program.run
loop do
run.next
end
assert_equal [7, 5, 6, 0, 0, 9], program.registers
end
end
def solve(input)
program = Program.parse(input)
run = program.run
loop do
run.next
end
program.registers[0]
end
if __FILE__ == $0
require "minitest/autorun" and exit if ENV["TEST"]
puts solve(ARGF.read)
end

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2018/rust/Cargo.lock generated
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@ -1,205 +0,0 @@
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"block-buffer",
"byte-tools",
"digest",
"fake-simd",
]
[[package]]
name = "syn"
version = "0.14.9"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "261ae9ecaa397c42b960649561949d69311f08eeaea86a65696e6e46517cf741"
dependencies = [
"proc-macro2",
"quote",
"unicode-xid",
]
[[package]]
name = "typenum"
version = "1.10.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "612d636f949607bdf9b123b4a6f6d966dedf3ff669f7f045890d3a4a73948169"
[[package]]
name = "ucd-trie"
version = "0.1.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "71a9c5b1fe77426cf144cc30e49e955270f5086e31a6441dfa8b32efc09b9d77"
[[package]]
name = "unicode-xid"
version = "0.1.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"

11
2018/rust/Cargo.toml
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@ -1,11 +0,0 @@
[package]
name = "advent_of_code"
version = "0.1.0"
authors = ["Alpha Chen <alpha.chen@gmail.com>"]
edition = "2018"
[dependencies]
lazy_static = "1.2.0"
pest = "2.0"
pest_derive = "2.0"
regex = "1"

64
2018/rust/src/bin/day_01.rs
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@ -1,64 +0,0 @@
use std::collections::HashMap;
use std::error::Error;
use std::io::{self, Read};
fn main() -> Result<(), Box<Error>> {
let mut input = String::new();
io::stdin().read_to_string(&mut input)?;
let output = solve_1(&input, "\n");
println!("{}", output);
Ok(())
}
#[allow(dead_code)]
fn solve_0(input: &str, delimiter: &str) -> String {
let sum: i32 = input
.trim()
.split(delimiter)
.map(|change| change.parse::<i32>().unwrap())
.sum();
sum.to_string()
}
#[test]
fn test_solve_0() {
assert_eq!(solve_0("+1, -2, +3, +1", ", "), "3");
}
fn solve_1(input: &str, delimiter: &str) -> String {
vec![0 as i32] // Start with 0 frequency
.into_iter()
.chain(
input
.trim()
.split(delimiter)
.map(|change| change.parse::<i32>().unwrap())
.cycle(),
)
.scan(0, |freq, change| {
*freq += change;
Some(*freq)
})
.scan(HashMap::new(), |history, freq| {
let count = history.entry(freq).or_insert(0);
*count += 1;
Some((freq, *count))
})
.filter(|(_, count)| *count > 1)
.map(|(freq, _)| freq)
.next()
.unwrap()
.to_string()
}
#[test]
fn test_solve_1() {
assert_eq!(solve_1("+1, -2, +3, +1", ", "), "2");
assert_eq!(solve_1("+1, -1", ", "), "0");
assert_eq!(solve_1("+3, +3, +4, -2, -4", ", "), "10");
assert_eq!(solve_1("-6, +3, +8, +5, -6", ", "), "5");
assert_eq!(solve_1("+7, +7, -2, -7, -4", ", "), "14");
}

65
2018/rust/src/bin/day_02.rs
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@ -1,65 +0,0 @@
use std::error::Error;
use std::io::{self, Read};
fn main() -> Result<(), Box<Error>> {
let mut input = String::new();
io::stdin().read_to_string(&mut input)?;
let output = solve(&input);
println!("{}", output);
Ok(())
}
fn solve(input: &str) -> String {
let box_ids: Vec<_> = input.lines().map(BoxId::new).collect();
let two_count = box_ids.iter().filter(|&x| x.is_two()).count();
let three_count = box_ids.iter().filter(|&x| x.is_three()).count();
(two_count * three_count).to_string()
}
struct BoxId(String);
impl BoxId {
fn new(s: &str) -> Self {
BoxId(s.into())
}
fn is_two(&self) -> bool {
self.is_n(2)
}
fn is_three(&self) -> bool {
self.is_n(3)
}
fn is_n(&self, n: usize) -> bool {
self.0
.chars()
.any(|x| self.0.chars().filter(|&y| x == y).count() == n)
}
}
#[test]
fn test_is_two() {
assert_eq!(BoxId::new("abcdef").is_two(), false);
assert_eq!(BoxId::new("bababc").is_two(), true);
assert_eq!(BoxId::new("abbcde").is_two(), true);
assert_eq!(BoxId::new("abcccd").is_two(), false);
assert_eq!(BoxId::new("aabcdd").is_two(), true);
assert_eq!(BoxId::new("abcdee").is_two(), true);
assert_eq!(BoxId::new("ababab").is_two(), false);
}
#[test]
fn test_is_three() {
assert_eq!(BoxId::new("abcdef").is_three(), false);
assert_eq!(BoxId::new("bababc").is_three(), true);
assert_eq!(BoxId::new("abbcde").is_three(), false);
assert_eq!(BoxId::new("abcccd").is_three(), true);
assert_eq!(BoxId::new("aabcdd").is_three(), false);
assert_eq!(BoxId::new("abcdee").is_three(), false);
assert_eq!(BoxId::new("ababab").is_three(), true);
}

129
2018/rust/src/bin/day_03.rs
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use std::collections::HashMap;
use std::error::Error;
use std::io::{self, Read};
use std::str::FromStr;
use regex::Regex;
fn main() -> Result<(), Box<Error>> {
let mut input = String::new();
io::stdin().read_to_string(&mut input)?;
let output = solve(&input)?;
println!("{}", output);
Ok(())
}
fn solve(input: &str) -> Result<String, Box<Error>> {
let claims: Vec<_> = input
.lines()
.map(str::trim)
.map(Claim::from_str)
.collect::<Result<_, _>>()?;
let fabric = claims.iter().fold(
HashMap::new(),
|mut fabric: HashMap<(usize, usize), Vec<usize>>, claim| {
for square_inch in claim.square_inches() {
fabric
.entry(square_inch)
.and_modify(|ids| ids.push(claim.id))
.or_insert_with(|| vec![claim.id]);
}
fabric
},
);
let values: Vec<_> = fabric.values().collect();
let output = values
.iter()
.map(|ids| ids[0])
.find(|id| !values.iter().any(|ids| ids.len() > 1 && ids.contains(id)))
.unwrap()
.to_string();
Ok(output)
}
#[test]
fn test_solve() {
let input = r"
#1 @ 1,3: 4x4
#2 @ 3,1: 4x4
#3 @ 5,5: 2x2
"
.trim();
assert_eq!(&solve(input).unwrap(), "3");
}
#[derive(Debug, PartialEq, Eq)]
struct Claim {
id: usize,
x: usize,
y: usize,
width: usize,
height: usize,
}
impl Claim {
fn square_inches(&self) -> impl Iterator<Item = (usize, usize)> + '_ {
(self.x..self.x + self.width)
.flat_map(move |x| (self.y..self.y + self.height).map(move |y| (x, y)))
}
}
#[test]
fn test_claim_square_inches() {
let claim = Claim {
id: 1,
x: 2,
y: 3,
width: 4,
height: 4,
};
let square_inches: Vec<_> = claim.square_inches().collect();
assert_eq!(square_inches.len(), 16);
assert!(square_inches.contains(&(2, 3)));
assert!(square_inches.contains(&(5, 3)));
assert!(square_inches.contains(&(5, 6)));
assert!(square_inches.contains(&(2, 6)));
}
impl FromStr for Claim {
type Err = Box<Error>;
fn from_str(s: &str) -> Result<Self, Self::Err> {
let re =
Regex::new(r"^#(?P<id>\d+) @ (?P<x>\d+),(?P<y>\d+): (?P<width>\d+)x(?P<height>\d+)$")
.unwrap();
let captures = re.captures(s).unwrap();
let id = captures.name("id").unwrap().as_str().parse()?;
let x = captures.name("x").unwrap().as_str().parse()?;
let y = captures.name("y").unwrap().as_str().parse()?;
let width = captures.name("width").unwrap().as_str().parse()?;
let height = captures.name("height").unwrap().as_str().parse()?;
Ok(Claim {
id,
x,
y,
width,
height,
})
}
}
#[test]
fn test_claim_from_str() {
let claim = Claim::from_str("#1 @ 1,3: 4x4").unwrap();
assert_eq!(
claim,
Claim {
id: 1,
x: 1,
y: 3,
width: 4,
height: 4
}
);
}

184
2018/rust/src/bin/day_04.rs
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@ -1,184 +0,0 @@
use std::collections::HashMap;
use std::error::Error;
use std::io::{self, Read};
use std::ops::Range;
use pest::iterators::Pair;
use pest::Parser;
use pest_derive::Parser;
fn main() -> Result<(), Box<Error>> {
let mut input = String::new();
io::stdin().read_to_string(&mut input)?;
let output = solve(&input)?;
println!("{}", output);
Ok(())
}
fn solve(input: &str) -> Result<String, Box<Error>> {
let records = Record::parse(input)?;
let mut stats = HashMap::new();
for record in records {
let minute_stats = stats.entry(record.guard_id).or_insert_with(HashMap::new);
let minutes: Vec<_> = record
.sleep_ranges
.into_iter()
.flat_map(|x| x.collect::<Vec<_>>())
.collect();
for minute in minutes {
let count = minute_stats.entry(minute).or_insert(0);
*count += 1
}
}
// Part One
// let (guard, minute_stats) = stats
// .iter()
// .max_by_key::<usize, _>(|(_, v)| v.iter().map(|(_, v)| v).sum())
// .unwrap();
// let (minute, _) = minute_stats.iter().max_by_key(|(_, &v)| v).unwrap();
// Part Two
let (guard, (minute, _)) = stats
.iter()
.flat_map(|(k, minute_counts)| minute_counts.iter().max_by_key(|(_, &v)| v).map(|v| (k, v)))
.max_by_key(|(_, (_, &v))| v)
.unwrap();
Ok((guard * minute).to_string())
}
#[test]
fn test_solve() {
let input = r"
[1518-11-01 00:00] Guard #10 begins shift
[1518-11-01 00:05] falls asleep
[1518-11-01 00:25] wakes up
[1518-11-01 00:30] falls asleep
[1518-11-01 00:55] wakes up
[1518-11-01 23:58] Guard #99 begins shift
[1518-11-02 00:40] falls asleep
[1518-11-02 00:50] wakes up
[1518-11-03 00:05] Guard #10 begins shift
[1518-11-03 00:24] falls asleep
[1518-11-03 00:29] wakes up
[1518-11-04 00:02] Guard #99 begins shift
[1518-11-04 00:36] falls asleep
[1518-11-04 00:46] wakes up
[1518-11-05 00:03] Guard #99 begins shift
[1518-11-05 00:45] falls asleep
[1518-11-05 00:55] wakes up
"
.trim();
let output = solve(input).unwrap();
// Part One
// assert_eq!(output, "240".to_string());
// Part Two
assert_eq!(output, "4455".to_string());
}
#[derive(Debug)]
struct Record {
guard_id: usize,
sleep_ranges: Vec<Range<usize>>,
}
impl Record {
fn parse(s: &str) -> Result<Vec<Record>, Box<Error>> {
let mut records: Vec<_> = s.lines().collect();
records.sort();
let input = records.join("\n");
let mut parsed = RecordsParser::parse(Rule::records, &input)?;
let records: Vec<Record> = parsed
.next()
.unwrap()
.into_inner()
.flat_map(|record| match record.as_rule() {
Rule::record => Some(record.into()),
Rule::EOI => None,
_ => unreachable!(),
})
.collect();
Ok(records)
}
fn parse_sleep_range(pair: Pair<Rule>) -> Range<usize> {
let mut sleep_range = pair.into_inner();
let falls_asleep: usize = Self::parse_minute(sleep_range.next().unwrap());
let wakes_up: usize = Self::parse_minute(sleep_range.next().unwrap());
(falls_asleep..wakes_up)
}
fn parse_minute(pair: Pair<Rule>) -> usize {
pair.into_inner().next().unwrap().as_str().parse().unwrap()
}
}
#[test]
fn test_parsing() {
let input = r"
[1518-11-01 00:00] Guard #10 begins shift
[1518-11-01 00:05] falls asleep
[1518-11-01 00:25] wakes up
[1518-11-01 00:30] falls asleep
[1518-11-01 00:55] wakes up
[1518-11-01 23:58] Guard #99 begins shift
[1518-11-02 00:40] falls asleep
[1518-11-02 00:50] wakes up
[1518-11-03 00:05] Guard #10 begins shift
[1518-11-03 00:24] falls asleep
[1518-11-03 00:29] wakes up
[1518-11-04 00:02] Guard #99 begins shift
[1518-11-04 00:36] falls asleep
[1518-11-04 00:46] wakes up
[1518-11-05 00:03] Guard #99 begins shift
[1518-11-05 00:45] falls asleep
[1518-11-05 00:55] wakes up
"
.trim();
let records = Record::parse(input).unwrap();
assert_eq!(records.len(), 5);
let record = &records[0];
assert_eq!(record.guard_id, 10);
assert_eq!(record.sleep_ranges, vec![(5..25), (30..55)]);
}
impl<'a> From<Pair<'a, Rule>> for Record {
fn from(pair: Pair<Rule>) -> Self {
let mut record = pair.into_inner();
let guard_id = record
.next()
.unwrap()
.into_inner()
.nth(1) // skip the minute
.unwrap()
.as_str()
.parse()
.unwrap();
let sleep_ranges: Vec<_> = record
.next()
.unwrap()
.into_inner()
.map(Self::parse_sleep_range)
.collect();
Record {
guard_id,
sleep_ranges,
}
}
}
#[derive(Parser)]
#[grammar = "day_04.pest"]
#[allow(dead_code)]
struct RecordsParser;

103
2018/rust/src/bin/day_05.rs
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@ -1,103 +0,0 @@
use std::error::Error;
use std::io::{self, Read};
use lazy_static::lazy_static;
use regex::Regex;
fn main() -> Result<(), Box<Error>> {
let mut input = String::new();
io::stdin().read_to_string(&mut input)?;
let output = solve(&input)?;
println!("{}", output);
Ok(())
}
fn solve(input: &str) -> Result<String, Box<Error>> {
let polymer = input.trim();
// Part One
// let reaction = Reaction {
// polymer: polymer.into()
// };
// Ok(reaction.last().map(|x| x.len().to_string()).unwrap())
// Part Two
let output = (b'a'..=b'z')
.map(|x| x as char)
.map(|x| {
polymer
.replace(x, "")
.replace(&x.to_uppercase().to_string(), "")
})
.map(|polymer| Reaction { polymer })
.flat_map(|reaction| reaction.last())
.map(|polymer| polymer.len())
.min();
Ok(output.unwrap().to_string())
}
#[test]
fn test_solve() {
let input = "dabAcCaCBAcCcaDA";
let output = solve(input).unwrap();
// Part One
// assert_eq!(output, "10".to_string());
// Part Two
assert_eq!(output, "4".to_string());
}
struct Reaction {
polymer: String,
}
impl Iterator for Reaction {
type Item = String;
fn next(&mut self) -> Option<Self::Item> {
lazy_static! {
static ref RE: Regex = {
let re: String = (b'a'..=b'z')
.map(|x| x as char)
.flat_map(|x| {
vec![
format!("{}{}", x, x.to_uppercase()),
format!("{}{}", x.to_uppercase(), x),
]
})
.collect::<Vec<_>>()
.join("|");
Regex::new(&re).unwrap()
};
}
let current = self.polymer.clone();
self.polymer = RE.replace(&self.polymer, "").into();
if self.polymer == current {
None
} else {
Some(self.polymer.to_string())
}
}
}
#[test]
fn test_reaction() {
let polymer = "dabAcCaCBAcCcaDA".into();
let mut reaction = Reaction { polymer };
let polymer = reaction.next().unwrap();
assert_eq!(polymer, "dabAaCBAcCcaDA".to_string());
let polymer = reaction.next().unwrap();
assert_eq!(polymer, "dabCBAcCcaDA".to_string());
let polymer = reaction.next().unwrap();
assert_eq!(polymer, "dabCBAcaDA".to_string());
assert_eq!(reaction.next(), Option::None);
}

287
2018/rust/src/bin/day_06.rs
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@ -1,287 +0,0 @@
use std::collections::{HashMap, HashSet};
use std::error::Error;
use std::hash::Hash;
use std::io::{self, Read};
use std::str::FromStr;
fn main() -> Result<(), Box<Error>> {
let mut input = String::new();
io::stdin().read_to_string(&mut input)?;
let output = part_two(&input, 10_000)?;
println!("{}", output);
Ok(())
}
fn part_two(input: &str, max_distance: usize) -> Result<String, Box<Error>> {
let coords = Coords::from_str(input)?;
let min_x = coords.0.iter().map(|c| c.x).min().unwrap();
let max_x = coords.0.iter().map(|c| c.x).max().unwrap();
let min_y = coords.0.iter().map(|c| c.y).min().unwrap();
let max_y = coords.0.iter().map(|c| c.y).max().unwrap();
let top_left = Coord { x: min_x, y: min_y };
let bottom_right = Coord { x: max_x, y: max_y };
let grid = Grid::new(top_left, bottom_right, |coord| {
coords.total_distance(*coord)
});
let area = grid
.locations
.values()
.filter(|&&x| x < max_distance)
.count();
Ok(area.to_string())
}
#[test]
fn test_part_two() {
let input = r"
1, 1
1, 6
8, 3
3, 4
5, 5
8, 9
";
let output = part_two(&input, 32).unwrap();
assert_eq!(output, "16".to_string());
}
#[allow(dead_code)]
fn part_one(input: &str) -> Result<String, Box<Error>> {
let coords = Coords::from_str(input)?;
let min_x = coords.0.iter().map(|c| c.x).min().unwrap();
let max_x = coords.0.iter().map(|c| c.x).max().unwrap();
let min_y = coords.0.iter().map(|c| c.y).min().unwrap();
let max_y = coords.0.iter().map(|c| c.y).max().unwrap();
let top_left = Coord { x: min_x, y: min_y };
let bottom_right = Coord { x: max_x, y: max_y };
let coord_names: HashMap<_, _> = coords
.0
.iter()
.enumerate()
.map(|(i, c)| (c, (i + 65) as u8 as char))
.collect();
let grid = Grid::new(top_left, bottom_right, |coord| {
coords
.closest(*coord)
.and_then(|closest| coord_names.get(&closest))
});
let edges: HashSet<_> = grid.edges().iter().flat_map(|&x| x).collect();
let mut area_sizes = HashMap::new();
grid.locations
.values()
.flat_map(|x| x)
.filter(|x| !edges.contains(x))
.for_each(|x| {
let count = area_sizes.entry(x).or_insert(0);
*count += 1;
});
let max_area = area_sizes.iter().map(|(_, v)| v).max().unwrap();
Ok(max_area.to_string())
}
#[test]
fn test_part_one() {
let input = r"
1, 1
1, 6
8, 3
3, 4
5, 5
8, 9
";
let output = part_one(&input).unwrap();
assert_eq!(output, "17".to_string());
}
#[derive(Debug)]
struct Grid<T> {
top_left: Coord,
bottom_right: Coord,
locations: HashMap<Coord, T>,
}
impl<T> Grid<T> {
fn new<C: Into<Coord>, F: Fn(&Coord) -> T>(top_left: C, bottom_right: C, f: F) -> Self {
let top_left = top_left.into();
let bottom_right = bottom_right.into();
let mut locations = HashMap::new();
for coord in top_left.grid(&bottom_right) {
locations.insert(coord, f(&coord));
}
Grid {
top_left,
bottom_right,
locations,
}
}
}
impl<T: Eq + Hash> Grid<T> {
fn edges(&self) -> HashSet<&T> {
let mut edges = HashSet::new();
for x in self.top_left.x..=self.bottom_right.x {
for &y in &[self.top_left.y, self.bottom_right.y] {
if let Some(t) = self.locations.get(&Coord { x, y }) {
edges.insert(t);
}
}
}
for y in self.top_left.y..=self.bottom_right.y {
for &x in &[self.top_left.x, self.bottom_right.x] {
if let Some(t) = self.locations.get(&Coord { x, y }) {
edges.insert(t);
}
}
}
edges
}
}
#[test]
fn test_edges() {
let top_left = Coord { x: 0, y: 0 };
let bottom_right = Coord { x: 2, y: 2 };
let grid = Grid::new(top_left, bottom_right, |coord| coord.y * 3 + coord.x);
let expected: HashSet<_> = vec![0, 1, 2, 3, 5, 6, 7, 8]
.iter()
.map(|&x| x as isize)
.collect();
assert_eq!(grid.edges(), expected.iter().collect());
}
#[derive(Debug)]
struct Coords(Vec<Coord>);
impl Coords {
fn closest<C: Into<Coord>>(&self, c: C) -> Option<Coord> {
let c = c.into();
let mut distances = HashMap::new();
for coord in &self.0 {
let distance = coord.distance(c);
let v = distances.entry(distance).or_insert_with(Vec::new);
v.push(coord);
}
let (_, closest_coords) = distances.iter().min_by_key(|(&k, _)| k)?;
if closest_coords.len() == 1 {
Some(*closest_coords[0])
} else {
None
}
}
fn total_distance<C: Into<Coord>>(&self, c: C) -> usize {
let c = c.into();
self.0.iter().map(|x| x.distance(c) as usize).sum()
}
}
#[test]
fn test_closest() {
let coords = Coords::from_str(
r"
1, 1
1, 6
8, 3
3, 4
5, 5
8, 9
",
)
.unwrap();
assert_eq!(coords.closest((0, 0)), Some(Coord::from((1, 1))));
assert_eq!(coords.closest((3, 2)), Some(Coord::from((3, 4))));
assert_eq!(coords.closest((5, 0)), None);
assert_eq!(coords.closest((0, 4)), None);
}
#[test]
fn test_total_distance() {
let coords = Coords::from_str(
r"
1, 1
1, 6
8, 3
3, 4
5, 5
8, 9
",
)
.unwrap();
assert_eq!(coords.total_distance((4, 3)), 30);
}
impl FromStr for Coords {
type Err = Box<Error>;
fn from_str(s: &str) -> Result<Self, Self::Err> {
let coords = s
.trim()
.lines()
.map(Coord::from_str)
.collect::<Result<_, _>>()?;
Ok(Coords(coords))
}
}
#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
struct Coord {
x: isize,
y: isize,
}
impl Coord {
fn distance<C: Into<Self>>(&self, other: C) -> isize {
let other = other.into();
(self.x - other.x).abs() + (self.y - other.y).abs()
}
fn grid(&self, to: &Self) -> impl Iterator<Item = Coord> + '_ {
let to = *to;
(self.x..=to.x).flat_map(move |x| (self.y..=to.y).map(move |y| (x, y).into()))
}
}
#[test]
fn test_distance() {
let coord = Coord { x: 4, y: 3 };
assert_eq!(coord.distance((1, 1)), 5);
assert_eq!(coord.distance((8, 9)), 10);
}
impl From<(isize, isize)> for Coord {
fn from((x, y): (isize, isize)) -> Self {
Coord { x, y }
}
}
impl FromStr for Coord {
type Err = Box<Error>;
fn from_str(s: &str) -> Result<Self, Self::Err> {
let mut xy = s.split(", ");
let x = xy.next().unwrap().parse()?;
let y = xy.next().unwrap().parse()?;
Ok(Coord { x, y })
}
}

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2018/rust/src/bin/day_07.rs
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#![feature(vec_remove_item)]
use std::cmp::{Ord, Ordering};
use std::collections::{HashMap, HashSet};
use std::error::Error;
use std::str::FromStr;
use regex::Regex;
use advent_of_code::main;
main!();
fn solve(input: &str) -> Result<String, Box<Error>> {
let assembly: Assembly = input.parse()?;
let output = part_two(assembly, 5, |x| (x as usize) - ('A' as usize) + 61);
Ok(output.to_string())
}
fn part_two<F: Fn(char) -> usize>(assembly: Assembly, worker_count: usize, step_time: F) -> usize {
let workers = Workers(vec![None; worker_count]);
PartTwo {
assembly,
workers,
step_time,
}
.count()
}
#[test]
fn test_part_two() {
let input = r"
Step C must be finished before step A can begin.
Step C must be finished before step F can begin.
Step A must be finished before step B can begin.
Step A must be finished before step D can begin.
Step B must be finished before step E can begin.
Step D must be finished before step E can begin.
Step F must be finished before step E can begin.
";
let assembly: Assembly = input.parse().unwrap();
let output = part_two(assembly, 2, |x| (x as usize) - ('A' as usize) + 1);
assert_eq!(output, 15);
}
struct PartTwo<F> {
assembly: Assembly,
workers: Workers,
step_time: F,
}
impl<F: Fn(char) -> usize> Iterator for PartTwo<F> {
type Item = Vec<Option<char>>;
fn next(&mut self) -> Option<Self::Item> {
if self.assembly.is_done() {
return None;
}
for (worker, step_id) in self
.workers
.available()
.iter_mut()
.zip(self.assembly.available())
{
worker.replace((step_id, (self.step_time)(step_id)));
self.assembly.start(step_id);
}
let done = self.workers.tick();
for step_id in done {
self.assembly.finish(step_id);
}
Some(self.workers.0.iter().map(|x| x.map(|x| x.0)).collect())
}
}
#[derive(Debug)]
struct Workers(Vec<Option<(char, usize)>>);
impl Workers {
fn available(&mut self) -> Vec<&mut Option<(char, usize)>> {
self.0.iter_mut().filter(|x| x.is_none()).collect()
}
fn tick(&mut self) -> Vec<char> {
let mut done = Vec::new();
for maybe_work in self.0.iter_mut() {
if let Some((step, mut time)) = maybe_work.take() {
time -= 1;
if time > 0 {
maybe_work.replace((step, time));
} else {
done.push(step);
}
}
}
done
}
}
#[test]
fn test_workers() {
let mut workers = Workers(vec![None; 5]);
let steps = workers.tick();
assert!(steps.is_empty());
let worker = &mut workers.available()[0];
worker.replace(('a', 5));
assert_eq!(workers.0[0], Some(('a', 5)));
let worker = &mut workers.available()[0];
worker.replace(('b', 1));
assert_eq!(workers.0[1], Some(('b', 1)));
let steps = workers.tick();
assert_eq!(workers.0[0], Some(('a', 4)));
assert_eq!(steps, vec!['b']);
}
#[allow(dead_code)]
fn part_one(assembly: &mut Assembly) -> Vec<char> {
let mut output = Vec::new();
while !assembly.is_done() {
let done = assembly.available()[0];
output.push(done);
assembly.finish(done);
}
output
}
#[test]
fn test_part_one() {
let input = r"
Step C must be finished before step A can begin.
Step C must be finished before step F can begin.
Step A must be finished before step B can begin.
Step A must be finished before step D can begin.
Step B must be finished before step E can begin.
Step D must be finished before step E can begin.
Step F must be finished before step E can begin.
";
let mut assembly: Assembly = input.parse().unwrap();
let output = part_one(&mut assembly);
assert_eq!(output, vec!['C', 'A', 'B', 'D', 'F', 'E']);
}
struct Assembly(Vec<Step>);
impl Assembly {
fn is_done(&self) -> bool {
self.0.iter().all(|x| x.state == State::Finished)
}
fn available(&self) -> Vec<char> {
let finished = self.finished();
let mut available: Vec<_> = self
.0
.iter()
.filter(|x| x.state == State::Unstarted)
.filter(|x| x.deps.iter().all(|x| finished.contains(x)))
.map(|x| x.id)
.collect();
available.sort();
available
}
fn finished(&self) -> Vec<char> {
self.0
.iter()
.filter(|x| x.state == State::Finished)
.map(|x| x.id)
.collect()
}
fn start(&mut self, step_id: char) {
if let Some(step) = self.0.iter_mut().find(|x| x.id == step_id) {
step.state = State::InProgress;
}
}
fn finish(&mut self, step_id: char) {
if let Some(step) = self.0.iter_mut().find(|x| x.id == step_id) {
step.state = State::Finished;
}
}
}
impl FromStr for Assembly {
type Err = Box<Error>;
fn from_str(s: &str) -> Result<Self, Self::Err> {
let re = Regex::new(r"^Step (\w).*step (\w)").unwrap();
let mut steps = HashMap::new();
s.trim()
.lines()
.flat_map(|x| re.captures(x))
.map(|x| {
x.iter()
.flat_map(|x| x)
.map(|x| x.as_str().chars().next().unwrap())
.collect::<Vec<_>>()
})
.map(|x| (x[1], x[2]))
.for_each(|(x, y)| {
steps.entry(x).or_insert_with(HashSet::new);
let entry = steps.entry(y).or_insert_with(HashSet::new);
entry.insert(x);
});
let steps = steps
.into_iter()
.map(|(id, deps)| {
let state = State::Unstarted;
Step { id, deps, state }
})
.collect();
Ok(Assembly(steps))
}
}
#[derive(Eq, PartialEq)]
struct Step {
id: char,
deps: HashSet<char>,
state: State,
}
impl PartialOrd for Step {
fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
Some(self.cmp(other))
}
}
impl Ord for Step {
fn cmp(&self, other: &Self) -> Ordering {
self.id.cmp(&other.id)
}
}
#[derive(Eq, PartialEq)]
enum State {
Unstarted,
InProgress,
Finished,
}

95
2018/rust/src/bin/day_09.rs
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use std::error::Error;
use regex::Regex;
use advent_of_code::main;
main!();
fn solve(input: &str) -> Result<String, Box<Error>> {
let re = Regex::new(r"(?P<players>\d+) players; last marble is worth (?P<points>\d+) points")
.unwrap();
let caps = re.captures(input).unwrap();
let player_count = caps.name("players").unwrap().as_str().parse()?;
let marble_count: usize = caps.name("points").unwrap().as_str().parse()?;
let high_score = play(player_count, marble_count * 100);
Ok(high_score.to_string())
}
fn play(player_count: usize, marble_count: usize) -> usize {
let mut scores = vec![0; player_count];
let mut circle = vec![Marble {
value: 0,
next: 0,
prev: 0,
}];
let mut current_player = 0;
let mut current_index: usize = 0;
for value in 1..=marble_count {
if value % 23 == 0 {
scores[current_player] += value;
for _ in 0..7 {
current_index = circle[current_index].prev;
}
let marble = &circle[current_index];
scores[current_player] += marble.value;
let prev = marble.prev;
let next = marble.next;
circle[prev].next = next;
circle[next].prev = prev;
current_index = next;
} else {
current_index = circle[current_index].next;
let current_marble = &circle[current_index];
let next = current_marble.next;
let prev = current_index;
let marble = Marble { value, next, prev };
circle.push(marble);
current_index = circle.len() - 1;
circle[prev].next = current_index;
circle[next].prev = current_index;
}
// if current_index % 100000 == 0 {
// println!("{}", current_index);
// }
// println!("[{}] {:?}", current_player + 1, circle_to_string(&circle));
current_player += 1;
current_player %= player_count;
}
*scores.iter().max().unwrap()
}
#[test]
fn test_play() {
assert_eq!(play(9, 25), 32);
assert_eq!(play(10, 1618), 8317);
assert_eq!(play(13, 7999), 146373);
assert_eq!(play(17, 1104), 2764);
assert_eq!(play(21, 6111), 54718);
assert_eq!(play(30, 5807), 37305);
}
// fn circle_to_string(circle: &Vec<Marble>) -> String {
// let mut i = 0;
// let mut v = Vec::new();
// loop {
// v.push(circle[i].value);
// i = circle[i].next;
// if i == 0 {
// break;
// }
// }
// format!("{:?}", v)
// }
#[derive(Debug)]
struct Marble {
value: usize,
next: usize,
prev: usize,
}

161
2018/rust/src/bin/day_12.rs
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use std::collections::HashMap;
use std::error::Error;
use std::fmt;
use std::str::FromStr;
use regex::Regex;
use advent_of_code::main;
main!();
fn solve(input: &str) -> Result<String, Box<Error>> {
let mut generation: Generation = input.parse()?;
for _ in 0..19 {
generation.next();
}
let pots = generation.next().unwrap();
let indices: Vec<_> = pots.iter().filter(|(_, &v)| v).map(|(&k, _)| k).collect();
let output: isize = indices.iter().sum();
Ok(output.to_string())
}
#[test]
fn test_solve() {
let input = r"
initial state: #..#.#..##......###...###
...## => #
..#.. => #
.#... => #
.#.#. => #
.#.## => #
.##.. => #
.#### => #
#.#.# => #
#.### => #
##.#. => #
##.## => #
###.. => #
###.# => #
####. => #
";
assert_eq!(solve(&input).unwrap(), 325.to_string());
}
struct Generation {
pots: HashMap<isize, bool>,
notes: HashMap<String, bool>,
}
impl fmt::Display for Generation {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
let plants: Vec<_> = self
.pots
.iter()
.filter(|(_, &v)| v)
.map(|(&k, _)| k)
.collect();
let min = *plants.iter().min().unwrap();
let max = *plants.iter().max().unwrap();
let s: String = (min..=max)
.map(|x| self.pots.get(&x).unwrap_or_else(|| &false))
.map(|&x| if x { '#' } else { '.' })
.collect();
write!(f, "{}", s)
}
}
impl Iterator for Generation {
type Item = HashMap<isize, bool>;
fn next(&mut self) -> Option<Self::Item> {
let plants: Vec<_> = self
.pots
.iter()
.filter(|(_, &v)| v)
.map(|(&k, _)| k)
.collect();
let min = *plants.iter().min().unwrap() - 2;
let max = *plants.iter().max().unwrap() + 2;
self.pots = (min..=max)
.map(|i| {
let key: String = ((i - 2)..=(i + 2))
.map(|x| self.pots.get(&x).unwrap_or_else(|| &false))
.map(|&x| if x { '#' } else { '.' })
.collect();
let value = *self.notes.get(&key).unwrap_or_else(|| &false);
(i, value)
})
.collect();
Some(self.pots.clone())
}
}
#[test]
fn test_generation() {
let input = r"
initial state: #..#.#..##......###...###
...## => #
..#.. => #
.#... => #
.#.#. => #
.#.## => #
.##.. => #
.#### => #
#.#.# => #
#.### => #
##.#. => #
##.## => #
###.. => #
###.# => #
####. => #
";
let mut generation: Generation = input.parse().unwrap();
let pots = generation.pots.clone();
assert!(pots.get(&0).unwrap());
assert!(pots.get(&3).unwrap());
assert!(!pots.get(&4).unwrap());
let pots = generation.next().unwrap();
assert!(pots.get(&0).unwrap());
assert!(!pots.get(&3).unwrap());
assert!(pots.get(&4).unwrap());
}
impl FromStr for Generation {
type Err = Box<Error>;
fn from_str(s: &str) -> Result<Self, Self::Err> {
let mut lines = s.trim().lines();
let initial_state = lines.next().unwrap();
let pots = Regex::new(r"[.#]+")
.ok()
.and_then(|re| re.find(initial_state))
.unwrap()
.as_str()
.chars()
.enumerate()
.map(|(i, c)| (i as isize, c == '#'))
.collect();
lines.next(); // skip blank line
let notes = lines
.map(|line| {
let mut note = line.split(" => ");
let key = note.next().unwrap();
let value = note.next().unwrap() == "#";
(key.into(), value)
})
.collect();
Ok(Generation { pots, notes })
}
}

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2018/rust/src/bin/day_14.rs
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use std::error::Error;
use advent_of_code::main;
main!();
fn solve(input: &str) -> Result<String, Box<Error>> {
let elves = vec![0, 1];
let recipes = "37".into();
let scoreboard = Scoreboard { elves, recipes };
let needle = input;
// let recipes = scoreboard.find(|x| x.len() > n + 9).unwrap();
// let score: String = recipes[n..n + 10].iter().map(|&x| x.to_string()).collect();
let n = scoreboard
.scan(0, |n, recipes| {
let seen = *n;
*n = recipes
.len()
.checked_sub(needle.len() - 1)
.unwrap_or_else(|| 0);
Some((seen, recipes[seen..recipes.len()].to_string()))
})
// .inspect(|x| println!("{:?}", x))
.flat_map(|(n, x)| x.find(needle).map(|i| n + i))
.next()
.unwrap();
Ok(n.to_string())
}
#[test]
fn test_solve() {
// Part Two
assert_eq!(&solve("51589").unwrap(), "9");
assert_eq!(&solve("01245").unwrap(), "5");
assert_eq!(&solve("92510").unwrap(), "18");
assert_eq!(&solve("59414").unwrap(), "2018");
}
#[derive(Debug)]
struct Scoreboard {
elves: Vec<usize>,
recipes: String,
}
impl Iterator for Scoreboard {
type Item = String;
fn next(&mut self) -> Option<Self::Item> {
self.recipes.push_str(
&self
.elves
.iter()
.map(|&x| self.recipes[x..=x].parse::<usize>().unwrap())
.sum::<usize>()
.to_string(),
);
self.elves = self
.elves
.iter()
.map(|&x| (1 + self.recipes[x..=x].parse::<usize>().unwrap() + x) % self.recipes.len())
.collect();
Some(self.recipes.clone())
}
}
#[test]
fn test_scoreboard() {
let elves = vec![0, 1];
let recipes = "37".into();
let mut scoreboard = Scoreboard { elves, recipes };
let recipes = scoreboard.next().unwrap();
assert_eq!(recipes, "3710");
}

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2018/rust/src/bin/day_15.rs
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use std::cmp::Ordering;
use std::collections::{BinaryHeap, HashMap, HashSet};
use std::error::Error;
use std::fmt::{self, Display, Formatter};
use std::str::FromStr;
use advent_of_code::main;
main!();
fn solve(_input: &str) -> Result<String, Box<Error>> {
unimplemented!();
}
struct Combat {
map: Map,
}
impl Combat {
fn initiative(&self) -> Vec<(Square, Unit)> {
let mut initiative: Vec<_> = self.map.units.iter().map(|(&k, &v)| (k, v)).collect();
initiative.sort_by_key(|(x, _)| *x);
initiative
}
fn move_unit(&mut self, from: &Square, to: &Square) {
let unit = self.map.units.remove(from).unwrap();
self.map.units.insert(*to, unit);
}
}
impl Iterator for Combat {
type Item = Map;
fn next(&mut self) -> Option<Self::Item> {
for (square, unit) in self.initiative() {
if let Some(next_step) = unit.next_step(&square, &self.map) {
println!("{:?} -> {:?}", square, next_step);
self.move_unit(&square, &next_step);
}
}
Some(self.map.clone())
}
}
#[test]
fn test_combat() {
let map: Map = r"
#########
#G..G..G#
#.......#
#.......#
#G..E..G#
#.......#
#.......#
#G..G..G#
#########
"
.parse()
.unwrap();
let mut combat = Combat { map };
let map = combat.next().unwrap();
assert_eq!(
format!("{}", map),
r"
#########
#.G...G.#
#...G...#
#...E..G#
#.G.....#
#.......#
#G..G..G#
#.......#
#########
"
.trim()
.to_string()
);
let map = combat.next().unwrap();
assert_eq!(
format!("{}", map),
r"
#########
#..G.G..#
#...G...#
#.G.E.G.#
#.......#
#G..G..G#
#.......#
#.......#
#########
"
.trim()
.to_string()
);
let map = combat.next().unwrap();
assert_eq!(
format!("{}", map),
r"
#########
#.......#
#..GGG..#
#..GEG..#
#G..G...#
#......G#
#.......#
#.......#
#########
"
.trim()
.to_string()
);
}
#[derive(Clone)]
struct Map {
walls: HashSet<Square>,
units: HashMap<Square, Unit>,
}
impl Map {
fn squares(&self) -> impl Iterator<Item = &Square> {
self.walls.iter().chain(self.units.keys())
}
fn is_open(&self, square: &Square) -> bool {
!self.walls.contains(&square) && !self.units.contains_key(&square)
}
fn open_neighbors(&self, square: &Square) -> HashSet<Square> {
square
.neighbors()
.into_iter()
.filter(|x| self.is_open(x))
.collect()
}
fn distances(&self, from: &Square) -> HashMap<Square, usize> {
#[derive(Eq, PartialEq)]
struct State {
distance: usize,
square: Square,
}
impl Ord for State {
fn cmp(&self, other: &Self) -> Ordering {
other.distance.cmp(&self.distance)
}
}
impl PartialOrd for State {
fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
Some(self.cmp(other))
}
}
let mut distances = HashMap::new();
let mut queue = BinaryHeap::new();
queue.push(State {
distance: 0,
square: *from,
});
while let Some(State { distance, square }) = queue.pop() {
distances.entry(square).or_insert(distance);
self.open_neighbors(&square)
.iter()
.filter(|x| !distances.contains_key(x))
.map(|&x| State {
distance: distance + 1,
square: x,
})
.for_each(|x| queue.push(x));
}
distances
}
}
impl Display for Map {
fn fmt(&self, f: &mut Formatter) -> Result<(), fmt::Error> {
let min_y = self.squares().map(|x| (x.0).0).min().unwrap();
let max_y = self.squares().map(|x| (x.0).0).max().unwrap();
let min_x = self.squares().map(|x| (x.0).1).min().unwrap();
let max_x = self.squares().map(|x| (x.0).1).max().unwrap();
let mut out = String::new();
for y in min_y..=max_y {
for x in min_x..=max_x {
let square = Square((y, x));
out.push(if self.walls.contains(&square) {
'#'
} else if let Some(Unit { race, .. }) = self.units.get(&square) {
match race {
Race::Elf => 'E',
Race::Goblin => 'G',
}
} else {
'.'
})
}
out.push('\n');
}
write!(f, "{}", out.trim())
}
}
impl FromStr for Map {
type Err = Box<Error>;
fn from_str(s: &str) -> Result<Self, Self::Err> {
let mut walls = HashSet::new();
let mut units = HashMap::new();
s.trim()
.lines()
.enumerate()
.flat_map(|(y, line)| {
line.chars()
.enumerate()
.map(move |(x, c)| (Square((y, x)), c))
})
.for_each(|(square, c)| {
match c {
'#' => {
walls.insert(square);
}
'G' => {
units.insert(square, Unit::new(Race::Goblin));
}
'E' => {
units.insert(square, Unit::new(Race::Elf));
}
'.' => {}
_ => panic!(),
};
});
Ok(Self { walls, units })
}
}
#[test]
fn test_map_distances() {
let map: Map = r"
#######
#E..G.#
#...#.#
#.G.#G#
#######
"
.parse()
.unwrap();
let distances = map.distances(&Square((1, 1)));
assert!(!distances.contains_key(&Square((0, 0))));
assert!(!distances.contains_key(&Square((1, 4))));
assert!(!distances.contains_key(&Square((1, 5))));
assert_eq!(distances.get(&Square((2, 2))).unwrap(), &2);
assert_eq!(distances.get(&Square((1, 3))).unwrap(), &2);
assert_eq!(distances.get(&Square((3, 3))).unwrap(), &4);
}
#[test]
fn test_map_from_str() {
let input = r"
#######
#.G.E.#
#E.G.E#
#.G.E.#
#######
";
let map: Map = input.parse().unwrap();
assert!(map.walls.contains(&Square((0, 0))));
assert!(!map.walls.contains(&Square((1, 1))));
assert_eq!(map.units.get(&Square((1, 2))).unwrap().race, Race::Goblin);
assert_eq!(map.units.get(&Square((1, 4))).unwrap().race, Race::Elf);
}
#[derive(Clone, Copy, Debug, Eq, Hash, PartialEq)]
struct Square((usize, usize));
impl Square {
fn neighbors(&self) -> HashSet<Self> {
let (y, x) = self.0;
let mut set = HashSet::new();
set.insert(Square((y - 1, x)));
set.insert(Square((y + 1, x)));
set.insert(Square((y, x - 1)));
set.insert(Square((y, x + 1)));
set
}
}
impl Ord for Square {
fn cmp(&self, other: &Self) -> Ordering {
self.0.cmp(&other.0)
}
}
impl PartialOrd for Square {
fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
Some(self.cmp(other))
}
}
#[test]
fn test_square_ord() {
let mut squares: Vec<Square> = vec![(1, 2), (1, 4), (2, 1), (2, 3), (2, 5), (3, 2), (3, 4)]
.iter()
.map(|&x| Square(x))
.collect();
squares.sort();
assert_eq!(
squares.iter().map(|x| x.0).collect::<Vec<_>>(),
vec![(1, 2), (1, 4), (2, 1), (2, 3), (2, 5), (3, 2), (3, 4)]
);
}
#[derive(Clone, Copy, Debug)]
struct Unit {
race: Race,
hp: usize,
}
impl Unit {
fn new(race: Race) -> Self {
let hp = 200;
Unit { race, hp }
}
fn targets(&self, map: &Map) -> HashSet<Square> {
map.units
.iter()
.filter(|(_, x)| x.race == self.race.enemy())
.map(|(&x, _)| x)
.collect()
}
fn in_range(&self, square: &Square, map: &Map) -> HashSet<Square> {
let targets = self.targets(&map);
if square.neighbors().iter().any(|x| targets.contains(x)) {
return HashSet::new();
}
targets.iter().flat_map(|x| map.open_neighbors(x)).collect()
}
fn reachable(&self, square: &Square, map: &Map) -> HashMap<Square, usize> {
let in_range = self.in_range(square, map);
map.distances(square)
.into_iter()
.filter(|(x, _)| in_range.contains(x))
.collect()
}
fn chosen(&self, square: &Square, map: &Map) -> Option<Square> {
self.reachable(&square, &map)
.into_iter()
.fold(HashMap::new(), |mut m, (s, d)| {
let v = m.entry(d).or_insert_with(Vec::new);
v.push(s);
m
})
.iter()
.min_by_key(|(&x, _)| x)
.and_then(|(_, x)| x.iter().min().cloned()) // Is there a way to avoid this clone?
}
fn next_step(&self, square: &Square, map: &Map) -> Option<Square> {
self.chosen(square, map).as_ref().and_then(|x| {
let distances = map.distances(x);
map.open_neighbors(square)
.into_iter()
.fold(HashMap::new(), |mut m, x| {
if let Some(distance) = distances.get(&x) {
let v = m.entry(distance).or_insert_with(Vec::new);
v.push(x);
}
m
})
.iter()
.min_by_key(|(&x, _)| x)
.and_then(|(_, x)| x.iter().min().cloned()) // Is there a way to avoid this clone?
})
}
}
#[test]
fn test_unit() {
let map: Map = r"
#######
#E..G.#
#...#.#
#.G.#G#
#######
"
.parse()
.unwrap();
let square = Square((1, 1));
let unit = map.units.get(&square).unwrap();
let targets = unit.targets(&map);
assert_eq!(targets.len(), 3);
assert!(vec![(1, 4), (3, 2), (3, 5)]
.iter()
.map(|&x| Square(x))
.all(|x| targets.contains(&x)));
let in_range = unit.in_range(&square, &map);
assert_eq!(in_range.len(), 6);
assert!(vec![(1, 3), (1, 5), (2, 2), (2, 5), (3, 1), (3, 3)]
.iter()
.map(|&x| Square(x))
.all(|x| in_range.contains(&x)));
let reachable = unit.reachable(&square, &map);
assert_eq!(reachable.len(), 4);
assert!(vec![(1, 3), (2, 2), (3, 1), (3, 3)]
.iter()
.map(|&x| Square(x))
.all(|x| reachable.contains_key(&x)));
let chosen = unit.chosen(&square, &map);
assert_eq!(chosen.unwrap().0, (1, 3));
}
#[test]
fn test_unit_next_step() {
let map: Map = r"
#######
#.E...#
#.....#
#...G.#
#######
"
.parse()
.unwrap();
let square = Square((1, 2));
let unit = map.units.get(&square).unwrap();
let next_step = unit.next_step(&square, &map);
assert_eq!(next_step.unwrap().0, (1, 3));
}
#[derive(Clone, Copy, Debug, Eq, PartialEq)]
enum Race {
Elf,
Goblin,
}
impl Race {
fn enemy(self) -> Race {
match self {
Race::Elf => Race::Goblin,
Race::Goblin => Race::Elf,
}
}
}

201
2018/rust/src/bin/day_19.rs
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@ -1,201 +0,0 @@
use std::error::Error;
use std::str::FromStr;
use regex::Regex;
use advent_of_code::main;
main!();
fn solve(input: &str) -> Result<String, Box<Error>> {
let mut program: Program = input.parse()?;
program.registers[0] = 1;
let registers = program.last().unwrap();
let output = registers[0].to_string();
Ok(output)
}
type Registers = [usize; 6];
struct Program {
ip: usize,
instructions: Vec<Instruction>,
registers: Registers,
}
impl Program {
fn execute(&mut self, i: &Instruction) {
match i.opcode {
Opcode::Addr => self.registers[i.c] = self.registers[i.a] + self.registers[i.b],
Opcode::Addi => self.registers[i.c] = self.registers[i.a] + i.b,
Opcode::Mulr => self.registers[i.c] = self.registers[i.a] * self.registers[i.b],
Opcode::Muli => self.registers[i.c] = self.registers[i.a] * i.b,
Opcode::Banr => self.registers[i.c] = self.registers[i.a] & self.registers[i.b],
Opcode::Bani => self.registers[i.c] = self.registers[i.a] & i.b,
Opcode::Borr => self.registers[i.c] = self.registers[i.a] | self.registers[i.b],
Opcode::Bori => self.registers[i.c] = self.registers[i.a] | i.b,
Opcode::Setr => self.registers[i.c] = self.registers[i.a],
Opcode::Seti => self.registers[i.c] = i.a,
Opcode::Gtir => self.registers[i.c] = if i.a > self.registers[i.b] { 1 } else { 0 },
Opcode::Gtri => self.registers[i.c] = if self.registers[i.a] > i.b { 1 } else { 0 },
Opcode::Gtrr => {
self.registers[i.c] = if self.registers[i.a] > self.registers[i.b] {
1
} else {
0
}
}
Opcode::Eqir => self.registers[i.c] = if i.a == self.registers[i.b] { 1 } else { 0 },
Opcode::Eqri => self.registers[i.c] = if self.registers[i.a] == i.b { 1 } else { 0 },
Opcode::Eqrr => {
self.registers[i.c] = if self.registers[i.a] == self.registers[i.b] {
1
} else {
0
}
}
}
}
}
impl Iterator for Program {
type Item = Registers;
fn next(&mut self) -> Option<Self::Item> {
let ins = *self.instructions.get(self.registers[self.ip])?;
self.execute(&ins);
self.registers[self.ip] += 1;
Some(self.registers)
}
}
#[test]
fn test_program() {
let mut program: Program = r"
#ip 0
seti 5 0 1
seti 6 0 2
addi 0 1 0
addr 1 2 3
setr 1 0 0
seti 8 0 4
seti 9 0 5
"
.parse()
.unwrap();
assert_eq!(program.next().unwrap(), [1, 5, 0, 0, 0, 0]);
}
#[derive(Clone, Copy)]
struct Instruction {
opcode: Opcode,
a: usize,
b: usize,
c: usize,
}
#[derive(Clone, Copy)]
enum Opcode {
Addr,
Addi,
Mulr,
Muli,
Banr,
Bani,
Borr,
Bori,
Setr,
Seti,
Gtir,
Gtri,
Gtrr,
Eqir,
Eqri,
Eqrr,
}
impl FromStr for Program {
type Err = Box<Error>;
fn from_str(s: &str) -> Result<Self, Self::Err> {
let mut lines = s.trim().lines();
let ip_re = Regex::new(r"^#ip (\d+)$").unwrap();
let ip = lines
.next()
.and_then(|l| ip_re.captures(l))
.and_then(|c| c.get(1))
.unwrap()
.as_str()
.parse()?;
let instructions = lines.map(|l| l.parse()).collect::<Result<_, _>>()?;
let registers = [0; 6];
Ok(Program {
ip,
instructions,
registers,
})
}
}
impl FromStr for Instruction {
type Err = Box<Error>;
fn from_str(s: &str) -> Result<Self, Self::Err> {
let mut s = s.split_whitespace();
let opcode = s.next().unwrap().parse()?;
let a = s.next().unwrap().parse()?;
let b = s.next().unwrap().parse()?;
let c = s.next().unwrap().parse()?;
Ok(Instruction { opcode, a, b, c })
}
}
impl FromStr for Opcode {
type Err = Box<Error>;
fn from_str(s: &str) -> Result<Self, Self::Err> {
let opcode = match s {
"addr" => Opcode::Addr,
"addi" => Opcode::Addi,
"mulr" => Opcode::Mulr,
"muli" => Opcode::Muli,
"banr" => Opcode::Banr,
"bani" => Opcode::Bani,
"borr" => Opcode::Borr,
"bori" => Opcode::Bori,
"setr" => Opcode::Setr,
"seti" => Opcode::Seti,
"gtir" => Opcode::Gtir,
"gtri" => Opcode::Gtri,
"gtrr" => Opcode::Gtrr,
"eqir" => Opcode::Eqir,
"eqri" => Opcode::Eqri,
"eqrr" => Opcode::Eqrr,
_ => unreachable!(),
};
Ok(opcode)
}
}
// OPCODES = {
// addr: ->(a, b, c) { ->(registers) { registers[c] = registers[a] + registers[b] } },
// addi: ->(a, b, c) { ->(registers) { registers[c] = registers[a] + b } },
// mulr: ->(a, b, c) { ->(registers) { registers[c] = registers[a] * registers[b] } },
// muli: ->(a, b, c) { ->(registers) { registers[c] = registers[a] * b } },
// banr: ->(a, b, c) { ->(registers) { registers[c] = registers[a] & registers[b] } },
// bani: ->(a, b, c) { ->(registers) { registers[c] = registers[a] & b } },
// borr: ->(a, b, c) { ->(registers) { registers[c] = registers[a] | registers[b] } },
// bori: ->(a, b, c) { ->(registers) { registers[c] = registers[a] | b } },
// setr: ->(a, b, c) { ->(registers) { registers[c] = registers[a] } },
// seti: ->(a, b, c) { ->(registers) { registers[c] = a } },
// gtir: ->(a, b, c) { ->(registers) { registers[c] = (a > registers[b]) ? 1 : 0 } },
// gtri: ->(a, b, c) { ->(registers) { registers[c] = (registers[a] > b) ? 1 : 0 } },
// gtrr: ->(a, b, c) { ->(registers) { registers[c] = (registers[a] > registers[b]) ? 1 : 0 } },
// eqir: ->(a, b, c) { ->(registers) { registers[c] = (a == registers[b]) ? 1 : 0 } },
// eqri: ->(a, b, c) { ->(registers) { registers[c] = (registers[a] == b) ? 1 : 0 } },
// eqrr: ->(a, b, c) { ->(registers) { registers[c] = (registers[a] == registers[b]) ? 1 : 0 } },
// }

21
2018/rust/src/day_04.pest
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@ -1,21 +0,0 @@
records = { SOI ~ record* ~ EOI }
record = { begins_shift ~ sleep_ranges }
begins_shift = { date ~ " Guard #" ~ guard_id ~ " begins shift" ~ eol }
guard_id = { digit+ }
sleep_ranges = { sleep_range* }
sleep_range = { falls_asleep ~ wakes_up }
falls_asleep = { date ~ " falls asleep" ~ eol }
wakes_up = { date ~ " wakes up" ~ eol }
date = _{ "[" ~ year ~ "-" ~ month ~ "-" ~ day ~ " " ~ hour ~ ":" ~ minute ~ "]" }
year = _{ digit{4} }
month = _{ digit{2} }
day = _{ digit{2} }
hour = _{ digit{2} }
minute = { digit{2} }
digit = _{ '0'..'9' }
eol = _{ "\n" | EOI }

16
2018/rust/src/lib.rs
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@ -1,16 +0,0 @@
#[macro_export]
macro_rules! main {
() => {
fn main() -> Result<(), Box<std::error::Error>> {
use std::io::{self, Read};
let mut input = String::new();
io::stdin().read_to_string(&mut input)?;
let output = solve(&input)?;
println!("{}", output);
Ok(())
}
};
}

10
2019/ruby/Gemfile
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@ -1,10 +0,0 @@
# frozen_string_literal: true
source "https://rubygems.org"
git_source(:github) {|repo_name| "https://github.com/#{repo_name}" }
gem "minitest"
gem "pry"
gem "sorbet"
gem "sorbet-runtime"

25
2019/ruby/Gemfile.lock
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@ -1,25 +0,0 @@
GEM
remote: https://rubygems.org/
specs:
coderay (1.1.2)
method_source (0.9.2)
minitest (5.13.0)
pry (0.12.2)
coderay (~> 1.1.0)
method_source (~> 0.9.0)
sorbet (0.4.5109)
sorbet-static (= 0.4.5109)
sorbet-runtime (0.4.5109)
sorbet-static (0.4.5109-universal-darwin-14)
PLATFORMS
ruby
DEPENDENCIES
minitest
pry
sorbet
sorbet-runtime
BUNDLED WITH
2.1.0.pre.3

13
2019/ruby/Rakefile
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@ -1,13 +0,0 @@
require "rake/testtask"
task default: [:test, :srb]
Rake::TestTask.new do |t|
t.libs << "test"
t.test_files = FileList["test_*.rb"]
t.verbose = true
end
task :srb do
sh "srb tc"
end

154
2019/ruby/computer.rb
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@ -1,154 +0,0 @@
# typed: strict
require "stringio"
require "sorbet-runtime"
AnyIO = T.type_alias { T.any(IO, StringIO) }
Memory = T.type_alias { T::Array[T.nilable(Integer)] }
class Mode < T::Enum
enums do
Position = new
Immediate = new
Relative = new
end
extend T::Sig
sig {params(value: String).returns(Mode)}
def self.from(value)
case value
when ?0 then Mode::Position
when ?1 then Mode::Immediate
when ?2 then Mode::Relative
else fail "unexpected mode: #{value}"
end
end
end
OPCODES = T.let({
1 => ->(x, _, _, a, b, c) { x[c] = x[a] + x[b] }, # add
2 => ->(x, _, _, a, b, c) { x[c] = x[a] * x[b] }, # multiply
3 => ->(x, i, _, a) { x[a] = i.gets.to_i }, # input
4 => ->(x, _, o, a) { o.puts(x[a]) }, # output
5 => ->(x, _, _, a, b) { x.pc = x[b] if x[a].nonzero? }, # jump-if-true
6 => ->(x, _, _, a, b) { x.pc = x[b] if x[a].zero? }, # jump-if-false
7 => ->(x, _, _, a, b, c) { x[c] = (x[a] < x[b]) ? 1 : 0 }, # less than
8 => ->(x, _, _, a, b, c) { x[c] = (x[a] == x[b]) ? 1 : 0 }, # equals
9 => ->(x, _, _, a) { x.rb += x[a] }, # adjust relative base
99 => ->(*) { throw :halt }, # halt
}, T::Hash[Integer, T.untyped])
class Parameter
extend T::Sig
sig {params(value: T.any(Parameter, Integer)).returns(Parameter)}
def self.from(value)
case value
when Parameter then value
when Integer then new(Mode::Position, value)
else T.absurd(value)
end
end
sig {returns(Mode)}
attr_reader :mode
sig {returns(Integer)}
attr_reader :value
sig {params(mode: Mode, value: Integer).void}
def initialize(mode, value)
@mode = T.let(mode, Mode)
@value = T.let(value, Integer)
end
end
class Computer
extend T::Sig
sig {params(input: String).returns(Computer)}
def self.from(input)
new(input.split(?,).map(&:to_i))
end
sig {returns(Integer)}
attr_accessor :pc, :rb
sig {params(program: Memory).void}
def initialize(program)
@memory = T.let(program.dup, Memory)
@pc = T.let(0, Integer)
@rb = T.let(0, Integer)
end
sig {params(input: T.untyped, output: AnyIO).returns(Memory)}
def run(input=STDIN, output=STDOUT)
each(input, output).inject(nil) {|_,i| i }
end
sig {
params(
input: T.untyped,
output: AnyIO,
blk: T.nilable(T.proc.params(m: Memory).returns(T.nilable(Integer)))
).returns(T::Enumerator[Memory])
}
def each(input, output, &blk)
return enum_for(T.must(__method__), input, output) unless block_given?
catch(:halt) do
loop do
instruction = @memory[pc].to_s.rjust(5, ?0)
opcode = OPCODES.fetch(instruction[-2..-1].to_i)
self.pc += 1
n = opcode.arity - 3 # subtract the computer, input, and output params
args = (0...n).map {|i|
mode = Mode.from(T.must(instruction[2-i]))
value = @memory[pc + i] || 0
Parameter.new(mode, value)
}
self.pc += n
opcode.call(self, input, output, *args)
yield @memory
end
end
# Satisfy sorbet:
# https://sorbet-ruby.slack.com/archives/CHN2L03NH/p1575648549254600
Enumerator.new {}
end
sig {params(parameter: Parameter).returns(Integer)}
def [](parameter)
parameter = Parameter.from(parameter)
mode = parameter.mode
case mode
when Mode::Position then @memory[parameter.value] || 0
when Mode::Immediate then parameter.value
when Mode::Relative then @memory[rb + parameter.value] || 0
else T.absurd(mode)
end
end
alias_method :fetch, :[]
sig {params(parameter: Parameter, value: Integer).void}
def []=(parameter, value)
mode = parameter.mode
case mode
when Mode::Position then @memory[parameter.value] = value
when Mode::Immediate then raise "writes should never be in immediate mode"
when Mode::Relative then @memory[rb + parameter.value] = value
else T.absurd(mode)
end
end
end
if __FILE__ == $0
Computer.from(T.cast(ARGF, IO).read || "").run
end

16
2019/ruby/day_01.rb
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@ -1,16 +0,0 @@
# typed: false
# puts ARGF.read.lines.map(&:to_i).map {|mass|
# (mass / 3.0).floor - 2
# }.sum
fuel = ->(mass) {
total = 0
loop do
mass = (mass / 3.0).floor - 2
break if mass <= 0
total += mass
end
total
}
puts ARGF.read.lines.map(&:to_i).map(&fuel).sum

21
2019/ruby/day_02.rb
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@ -1,21 +0,0 @@
# typed: false
require_relative "computer"
program = ARGF.read.split(?,).map(&:to_i)
# modified = program.dup
# modified[1] = 12
# modified[2] = 2
# c = Computer.new(modified)
# puts c.each.inject(nil) {|_,i| i }.fetch(0)
noun, verb = (0..99).flat_map {|noun| (0..99).map {|verb| [noun, verb] } }
.find {|(noun, verb)|
modified = program.dup
modified[1] = noun
modified[2] = verb
c = Computer.new(modified)
final = c.run
final.fetch(0) == 19690720
}
puts 100 * noun + verb

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