[2016][rust][7.0]

profile
Alpha Chen 8 years ago
parent e695938abf
commit 053b51107d

File diff suppressed because it is too large Load Diff

@ -0,0 +1,78 @@
use errors::*;
pub fn solve(input: &str) -> Result<String> {
Ok(input.lines()
.map(|x| IP7::new(x))
.filter(IP7::supports_tls)
.count()
.to_string())
}
pub struct IP7 {
supernets: Vec<String>,
hypernets: Vec<String>,
}
impl IP7 {
fn new(s: &str) -> Self {
let mut current = String::new();
let mut supernets = Vec::new();
let mut hypernets = Vec::new();
for c in s.chars() {
match c {
'[' => {
supernets.push(current);
current = String::new();
}
']' => {
hypernets.push(current);
current = String::new();
}
c => current.push(c),
}
}
supernets.push(current);
IP7 {
supernets: supernets,
hypernets: hypernets,
}
}
fn supports_tls(&self) -> bool {
self.supernets.iter().any(|x| Self::abba(x)) &&
self.hypernets.iter().all(|x| !Self::abba(x))
}
fn abba(s: &str) -> bool {
let v: Vec<_> = s.chars().collect();
v.windows(4).any(|w| (w[0] != w[1]) && (w[0] == w[3]) && (w[1] == w[2]))
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_new() {
let ip = IP7::new("abba[mnop]qrst");
assert_eq!(ip.supernets, vec!["abba".to_string(), "qrst".to_string()]);
assert_eq!(ip.hypernets, vec!["mnop".to_string()]);
}
#[test]
fn test_abba() {
assert!(IP7::abba("abba"));
assert!(!IP7::abba("abcd"));
}
#[test]
fn test_supports_tls() {
assert_eq!(IP7::new("abba[mnop]qrst").supports_tls(), true);
assert_eq!(IP7::new("abcd[bddb]xyyx").supports_tls(), false);
assert_eq!(IP7::new("aaaa[qwer]tyui").supports_tls(), false);
assert_eq!(IP7::new("ioxxoj[asdfgh]zxcvbn").supports_tls(), true);
}
}

@ -12,3 +12,4 @@ pub mod day_03;
pub mod day_04;
pub mod day_05;
pub mod day_06;
pub mod day_07;

@ -10,7 +10,7 @@ fn main() {
let mut input = String::new();
io::stdin().read_to_string(&mut input).ok();
let solution = day_06::solve(&input)?;
let solution = day_07::solve(&input)?;
println!("{}", solution);
Ok(())

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