Day 1

one.rs

@@ -0,0 +1,16 @@
+fn main() {
+    let buf = std::fs::read_to_string("one.txt").unwrap();
+    let mut elves: Vec<u32> = buf
+        .split("\n\n")
+        .map(|s| {
+            s.trim()
+                .split("\n")
+                .map(|n| n.trim().parse::<u32>().unwrap())
+                .sum()
+        })
+        .collect();
+
+    elves.sort_unstable_by(|a, b| b.cmp(a));
+    println!("{}", elves[0]);
+    println!("{}", elves.into_iter().take(3).sum::<u32>());
+}