From 315f56f4c036d28241e3dfaf2c79884a23c40b41 Mon Sep 17 00:00:00 2001
From: Yash Karandikar <yash@karx.xyz>
Date: Sat, 3 Dec 2022 13:16:29 -0600
Subject: [PATCH] Day 3 part 2

---
 three.rs | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/three.rs b/three.rs
index 7a0bed3..ebf2cd6 100644
--- a/three.rs
+++ b/three.rs
@@ -3,12 +3,12 @@ fn main() {
 
     let mut sum = 0u32;
 
-    for line in buf.split("\n") {
-        let (first, last) = line.split_at(line.len() / 2);
-        let mut seen_before = Vec::with_capacity(first.len());
+    for chunk in buf.split("\n").collect::<Vec<_>>().chunks_exact(3) {
+        let [line1, line2, line3] = chunk else { unreachable!() };
+        let mut seen_before = Vec::with_capacity(line1.len());
 
-        for c in first.chars() {
-            if last.contains(c) && !seen_before.contains(&c) {
+        for c in line1.chars() {
+            if !seen_before.contains(&c) && line2.contains(c) && line3.contains(c) {
                 let priority = if c.is_ascii_uppercase() {
                     (c as u8) - 65 + 27
                 } else {