day 1 complete

src/day1.rs

@@ -8,44 +8,79 @@ pub fn run() {
     println!("\tPart 2: {}", part2(&input));
 }
 
-fn part1(food_list: &str) -> isize {
-    todo!()
+fn part1(food_input: &str) -> usize {
+    food_input
+        .split("\n\n")
+        .collect::<Vec<&str>>()
+        .into_iter()
+        .map(|elf| {
+            elf.split_whitespace()
+                .map(|food| food.parse::<usize>().unwrap())
+                .sum()
+        })
+        .collect::<Vec<usize>>()
+        .into_iter()
+        .max()
+        .unwrap()
 }
-fn part2(food_list: &str) -> usize {
-    todo!()
+fn part2(food_input: &str) -> usize {
+    let mut elves_calories = food_input
+        .split("\n\n")
+        .collect::<Vec<&str>>()
+        .into_iter()
+        .map(|elf| {
+            elf.split_whitespace()
+                .map(|food| food.parse::<usize>().unwrap())
+                .sum()
+        })
+        .collect::<Vec<usize>>();
+
+    elves_calories.sort_by(|l, r| r.cmp(l));
+
+    elves_calories[..3].iter().sum::<usize>()
 }
 
-// #[cfg(test)]
-// mod tests {
-//     use super::*;
+#[cfg(test)]
+mod tests {
+    use super::*;
 
-// #[test]
-// fn test_1() {
-//     let mut input = "(())".to_string();
-//     assert_eq!(part1(&input), 0);
+    #[test]
+    fn test_1() {
+        let input = "1000
+2000
+3000
 
-//     input = "()()".to_string();
-//     assert_eq!(part1(&input), 0);
+4000
 
-//     input = "(((".to_string();
-//     assert_eq!(part1(&input), 3);
+5000
+6000
 
-//     input = "(()(()(".to_string();
-//     assert_eq!(part1(&input), 3);
+7000
+8000
+9000
 
-//     input = "())".to_string();
-//     assert_eq!(part1(&input), -1);
+10000";
 
-//     input = ")())())".to_string();
-//     assert_eq!(part1(&input), -3);
-// }
+        assert_eq!(part1(input), 24000);
+    }
 
-//     #[test]
-//     fn test_2() {
-//         let mut input = ")".to_string();
-//         assert_eq!(part2(&input), 1);
+    #[test]
+    fn test_2() {
+        let input = "1000
+2000
+3000
 
-//         input = "()())".to_string();
-//         assert_eq!(part2(&input), 5);
-//     }
-// }
+4000
+
+5000
+6000
+
+7000
+8000
+9000
+
+10000";
+
+        assert_eq!(part2(input), 45000);
+    }
+}