From d998cb02aa89e93dbad8371b0ed32834dec27bea Mon Sep 17 00:00:00 2001
From: Antoine Martin <antoine97.martin@gmail.com>
Date: Thu, 24 Dec 2020 02:06:29 +0100
Subject: [PATCH] 2020: day23: use rotate_left from VecDeque

---
 aoc2020/src/day23.rs | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/aoc2020/src/day23.rs b/aoc2020/src/day23.rs
index ff6ac4f..cd27a66 100644
--- a/aoc2020/src/day23.rs
+++ b/aoc2020/src/day23.rs
@@ -53,8 +53,7 @@ impl CupCircle {
     /// This doesn't change anything to the cup circle layout, except that the new first cup is
     /// considered the "current" cup at the end of a step in our implementation
     fn shift(&mut self) {
-        let front = self.0.pop_front().unwrap();
-        self.0.push_back(front);
+        self.0.rotate_left(1);
     }
 
     /// Executes one step of the game