From 764bada19e30aae18287e97a9d7141ac78e1bb36 Mon Sep 17 00:00:00 2001
From: Bond_009 <bond.009@outlook.com>
Date: Sat, 12 Dec 2020 22:53:19 +0100
Subject: Add day 12

---
 utils.h | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'utils.h')

diff --git a/utils.h b/utils.h
index db6b5de..840d1d4 100644
--- a/utils.h
+++ b/utils.h
@@ -1,6 +1,8 @@
 #ifndef AOC_UTILS_H
 #define AOC_UTILS_H
 
+#define SWAP(a, b) (((a) ^= (b)), ((b) ^= (a)), ((a) ^= (b)))
+
 #define likely(x)       __builtin_expect((x), 1)
 #define unlikely(x)     __builtin_expect((x), 0)
 
-- 
cgit v1.2.3