From 7d36ddd8fee12a79a185ebf1ea139af0d766ee1b Mon Sep 17 00:00:00 2001
From: Alpha Chen <alpha.chen@gmail.com>
Date: Sat, 2 Dec 2017 12:48:17 -0800
Subject: [PATCH] [2017][rust][2.0]

---
 2017/rust/src/day_02.rs | 19 +++++++++++++++++++
 2017/rust/src/main.rs   |  3 ++-
 2 files changed, 21 insertions(+), 1 deletion(-)
 create mode 100644 2017/rust/src/day_02.rs

diff --git a/2017/rust/src/day_02.rs b/2017/rust/src/day_02.rs
new file mode 100644
index 0000000..2eafa08
--- /dev/null
+++ b/2017/rust/src/day_02.rs
@@ -0,0 +1,19 @@
+use failure::*;
+
+pub fn solve(input: &str) -> Result<String, Error> {
+    Ok(
+        input
+            .trim()
+            .split("\n")
+            .map(|row| {
+                let row: Vec<_> = row.split("\t")
+                    .map(|x| x.parse::<usize>().unwrap())
+                    .collect();
+                let min = row.iter().min().unwrap();
+                let max = row.iter().max().unwrap();
+                max - min
+            })
+            .sum::<usize>()
+            .to_string(),
+    )
+}
diff --git a/2017/rust/src/main.rs b/2017/rust/src/main.rs
index 2f98976..1dc42c1 100644
--- a/2017/rust/src/main.rs
+++ b/2017/rust/src/main.rs
@@ -5,6 +5,7 @@ use std::io::{self, Read};
 use failure::Error;
 
 mod day_01;
+mod day_02;
 
 fn main() {
     if let Err(e) = run() {
@@ -16,7 +17,7 @@ fn run() -> Result<(), Error> {
     let mut input = String::new();
     io::stdin().read_to_string(&mut input)?;
 
-    let solution = day_01::solve(&input)?;
+    let solution = day_02::solve(&input)?;
     println!("{}", solution);
 
     Ok(())