From 41d07fa419b2e0d7378a1886112585dbfbdddfd3 Mon Sep 17 00:00:00 2001
From: Bert Peters <bert@bertptrs.nl>
Date: Thu, 22 Aug 2019 12:42:46 +0200
Subject: [PATCH] Switch loop order for locality.

---
 2018/src/day22.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/2018/src/day22.rs b/2018/src/day22.rs
index eff7e09..94442ed 100644
--- a/2018/src/day22.rs
+++ b/2018/src/day22.rs
@@ -161,8 +161,8 @@ impl Solution for Day22 {
             let xmin = if x == 0 { 0 } else { x - 1 };
             let ymin = if y == 0 { 0 } else { y - 1 };
 
-            for xn in xmin..=(x + 1) {
-                for yn in ymin..=(y + 1) {
+            for yn in ymin..=(y + 1) {
+                for xn in xmin..=(x + 1) {
                     let new_state = State {
                         pos: (xn, yn),
                         torch: state.torch,