Day 3, puzzle 1

src/bin/d3p1.rs

@@ -0,0 +1,15 @@
+use aoc22::day3;
+use aoc22::util;
+
+pub fn main() {
+    let rucksacks = day3::parse_rucksacks(&util::parse_input());
+
+    let mut sum = 0;
+    for (first, second) in rucksacks {
+        let common: Vec<_> = first.intersection(&second).collect();
+        assert!(common.len() == 1);
+        sum += day3::priority(**common.first().unwrap());
+    }
+
+    println!("Sum of priorities is {}", sum);
+}