From b4bf4e61ad2cb1acca569dd63219d331af183186 Mon Sep 17 00:00:00 2001
From: Joe Ardent <code@ardent.nebcorp.com>
Date: Sat, 3 Dec 2022 16:22:48 -0800
Subject: [PATCH] use bitand for sets

---
 2022-aoc/src/d3.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/2022-aoc/src/d3.rs b/2022-aoc/src/d3.rs
index d189729..eb4ebab 100644
--- a/2022-aoc/src/d3.rs
+++ b/2022-aoc/src/d3.rs
@@ -30,11 +30,11 @@ fn parse_input2(input: &str) -> Vec<u32> {
     let mut out = Vec::with_capacity(input.len() / 3);
     let lines: Vec<&str> = input.lines().collect();
     for group in lines.chunks_exact(3) {
-        let [x, y, z] = group else {panic!()};
+        let [x, y, z] = group else { panic!() };
         let x: HashSet<char> = HashSet::from_iter(x.chars());
         let y = HashSet::from_iter(y.chars());
         let z = HashSet::from_iter(z.chars());
-        let xy: HashSet<char> = x.intersection(&y).copied().collect();
+        let xy = &x & &y;
         let common = xy.intersection(&z).next().unwrap();
         out.push(get_priority(common));
     }