day 1

day1/src/main.rs

@@ -0,0 +1,24 @@
+fn main() {
+    const INPUT: &str = include_str!("../input.txt");
+
+    let split = INPUT.split("\n");
+    let mut calories: Vec<u64> = Vec::new();
+
+    let mut running_total: u64 = 0;
+    for s in split {
+        if s == "" {
+            calories.push(running_total);
+            running_total = 0;
+        } else {
+            running_total += s.trim().parse::<u64>().expect("Invalid input line: {s}!");
+        }
+    }
+
+    let max_calories = calories.iter().max().unwrap();
+
+    println!("Max calories: {max_calories}");
+
+    calories.sort_by(|a, b| b.cmp(a));
+    let top_three = calories[0] + calories[1] + calories[2];
+    println!("Sum of top 3: {top_three}");
+}