From b9d62c2835e6ccefe7e2dc511690c444a3d62a6b Mon Sep 17 00:00:00 2001
From: Hubert Van De Walle <hubv@protonmail.com>
Date: Fri, 18 Dec 2020 12:30:13 +0100
Subject: [PATCH] Use LinkedList.peekLast() to avoid walking the whole list

---
 days/src/main/kotlin/Day18.kt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/days/src/main/kotlin/Day18.kt b/days/src/main/kotlin/Day18.kt
index e442793..338e0e6 100644
--- a/days/src/main/kotlin/Day18.kt
+++ b/days/src/main/kotlin/Day18.kt
@@ -58,7 +58,7 @@ class Day18(@Lines val input: Input<List<String>>) {
                 operands[i + 1] = result
             }
 
-            return operands.last()
+            return operands.peekLast()
         } else {
 
             var i = 0