From 9a0a6300399716b00052715ee4b1d04ef3119df0 Mon Sep 17 00:00:00 2001
From: Patrick Michl <patrick.michl@hetzner.com>
Date: Wed, 11 Dec 2024 11:31:35 +0100
Subject: [PATCH] day11

---
 day11.sh | 12 +++++-------
 1 file changed, 5 insertions(+), 7 deletions(-)

diff --git a/day11.sh b/day11.sh
index e74b4af..40b454c 100644
--- a/day11.sh
+++ b/day11.sh
@@ -6,11 +6,12 @@ source ./utils/array.sh
 
 count_after_blinks() {
   local blinks="$1"
-  local -A stones=() new_stones=()
+  local -A stones=()
 
   for stone in "${@:2}"; do stones["$stone"]=1; done
 
   for ((n = 0; n < blinks; n++)); do
+    local -A new_stones=()
     for stone in "${!stones[@]}"; do
       if ((stone == 0)); then
         new_stones[1]="$((${new_stones[1]:-0} + stones["$stone"]))"
@@ -24,14 +25,11 @@ count_after_blinks() {
       else
         new_stones["$((stone * 2024))"]="$((${new_stones["$((stone * 2024))"]:-0} + stones["$stone"]))"
       fi
-      stones["$stone"]=0
     done
 
-    local old new
-    old="$(declare -p stones)"
-    new="$(declare -p new_stones)"
-    eval "${old/stones/new_stones}"
-    eval "${new/new_stones/stones}"
+    local tmp
+    tmp="$(declare -p new_stones)"
+    eval "${tmp/new_stones/stones}"
   done
 
   array.sum stones