day1

2022-12-01 12:27:20 +00:00
parent afaf4a1ddf
commit 38123f3a00
5 changed files with 48 additions and 2 deletions
@@ -0,0 +1,30 @@
+use std::io::{self, BufRead};
+
+fn main() {
+    let lines = io::stdin().lock().lines().map(|l| l.unwrap());
+    let mut sum = 0;
+    let mut max = [0, 0, 0];
+
+    for line in lines {
+        if let Ok(num) = line.parse::<usize>() {
+            sum += num;
+        } else {
+            match (sum > max[0], sum > max[1], sum > max[2]) {
+                (_, _, true) => {
+                    max.rotate_left(1);
+                    max[2] = sum;
+                }
+                (_, true, false) => {
+                    max[0] = max[1];
+                    max[1] = sum;
+                }
+                (true, false, false) => {
+                    max[0] = sum;
+                }
+                _ => (),
+            }
+            sum = 0;
+        }
+    }
+    println!("P1: {} P2: {}", max[2], max.iter().sum::<usize>());
+}