Day 01

src/day01/mod.rs

@@ -2,4 +2,29 @@ use crate::read;
 
 pub fn run() {
     let input = read("01");
+    let set = vec![0];
+
+    let mut res = input.lines().fold(set, |mut acc, x|{
+        if x.is_empty() {
+            acc.push(0);
+        } else {
+            let num: i32 = x.parse().unwrap();
+            *acc.last_mut().unwrap() += num;
+        }
+        acc
+    });
+    res.sort();
+    res.reverse();
+
+    #[cfg(feature="part2")]
+    {
+        let a = res.first().unwrap();
+        eprintln!("Part 01: {}", *a);
+    }
+
+    #[cfg(feature="part2")]
+    {
+        let b: i32 = res[..3].iter().sum();
+        eprintln!("Part 02: {}", b);
+    }
 }