finish day 14

src/days/day14.rs

@@ -10,12 +10,21 @@ type Input = (
 pub fn run() {
     let raw_input = util::read_input("inputs/day14.txt").unwrap();
     let input = process(&raw_input);
-    println!("Part 1: {}", part_1(input));
+    println!("Part 1: {}", part_1(input.clone()));
+    println!("Part 2: {}", part_2(input));
 }
 
 fn part_1(input: Input) -> usize {
+    polymer_strength(input, 10)
+}
+
+fn part_2(input: Input) -> usize {
+    polymer_strength(input, 40)
+}
+
+fn polymer_strength(input: Input, steps: usize) -> usize {
     let (mappings, mut singles, pairs) = input;
-    (0..10).fold(pairs, |old_pairs, _| {
+    (0..steps).fold(pairs, |old_pairs, _| {
         let mut new_pairs: HashMap<String, usize> = HashMap::new();
 
         old_pairs.iter().for_each(|(pair, pair_count)| {
@@ -68,3 +77,28 @@ fn process(input: &str) -> Input {
 
     (mappings, singles, pairs)
 }
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    extern crate test;
+    use test::Bencher;
+
+    #[bench]
+    fn bench_part_1(b: &mut Bencher) {
+        let raw_input = util::read_input("inputs/day14.txt").unwrap();
+        b.iter(|| {
+            let input = process(&raw_input);
+            part_1(input);
+        });
+    }
+
+    #[bench]
+    fn bench_part_2(b: &mut Bencher) {
+        let raw_input = util::read_input("inputs/day14.txt").unwrap();
+        b.iter(|| {
+            let input = process(&raw_input);
+            part_2(input);
+        });
+    }
+}