2015 day 1 and 2

src/bin/2015_01/main.rs

@@ -0,0 +1,29 @@
+use aoc::common;
+
+fn part1(input: &str) -> i32 {
+    input.chars().filter(|&c| c == '(').count() as i32 - input.chars().filter(|&c| c == ')').count() as i32
+}
+
+fn part2(input: &str) -> usize {
+    let mut ret = 1;
+    let mut floor = 0;
+    for (i, e) in input.chars().enumerate() {
+        if e == '(' {
+            floor += 1;
+        } else {
+            floor -= 1; 
+        }
+
+        if floor == -1 {
+            ret = i + 1;
+            break;
+        }
+    }
+    ret
+}
+
+fn main() {
+    let input = common::get_input();
+    common::timed(&input, part1, true);
+    common::timed(&input, part2, false);
+}

src/bin/2015_02/main.rs

@@ -0,0 +1,30 @@
+use aoc::common;
+
+fn part1(input: &str) -> i32 {
+    let mut total_wrapping_paper_area = 0;
+    for dims_str in input.lines() {
+        let dims = dims_str.split('x').map(|s| s.parse::<i32>().unwrap()).collect::<Vec<_>>();
+        let mut areas = [dims[0] * dims[1], dims[1] * dims[2], dims[2] * dims[0]];
+        areas.sort();
+        let wrapping_paper_area = areas[0] + 2 * (areas[0] + areas[1] + areas[2]);
+        total_wrapping_paper_area += wrapping_paper_area;
+    }
+    total_wrapping_paper_area
+}
+
+fn part2(input: &str) -> i32 {
+    let mut total_ribbon_length = 0;
+    for dims_str in input.lines() {
+        let mut dims = dims_str.split('x').map(|s| s.parse::<i32>().unwrap()).collect::<Vec<_>>();
+        dims.sort();
+        let ribbon_length = 2 * (dims[0] + dims[1]) + dims[0] * dims[1] * dims[2];
+        total_ribbon_length += ribbon_length;
+    }
+    total_ribbon_length
+}
+
+fn main() {
+    let input = common::get_input();
+    common::timed(&input, part1, true);
+    common::timed(&input, part2, false);
+}