From 7077559b3a6d5e258c2656125a9624166a9f1c98 Mon Sep 17 00:00:00 2001
From: Antoine Martin <antoine@alarsyo.net>
Date: Mon, 6 Dec 2021 12:15:25 +0100
Subject: [PATCH] 2021: day06: use a VecDeque for faster rotating

---
 aoc2021/src/day06.rs | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/aoc2021/src/day06.rs b/aoc2021/src/day06.rs
index 499531b..e52d172 100644
--- a/aoc2021/src/day06.rs
+++ b/aoc2021/src/day06.rs
@@ -1,3 +1,4 @@
+use std::collections::VecDeque;
 use std::fmt::Write;
 use std::str;
 
@@ -31,7 +32,7 @@ fn part2(input: &str) -> Result<usize> {
 }
 
 struct School {
-    fish_timers: [usize; SPAWNING_DELAY as usize + 2],
+    fish_timers: VecDeque<usize>,
 }
 
 impl School {
@@ -66,7 +67,9 @@ impl std::str::FromStr for School {
             fish_timers[fish?] += 1;
         }
 
-        Ok(School { fish_timers })
+        Ok(School {
+            fish_timers: fish_timers.into(),
+        })
     }
 }