X-Git-Url: https://git.sommitrealweird.co.uk/advent-of-code-2021.git/blobdiff_plain/69b45c947e9cdf6a41bf54ca8f7fe50b8c608bcc..2937ee52f420ee229ec5801508afeee4dbdd8a73:/day01/count.sh

diff --git a/day01/count.sh b/day01/count.sh
old mode 100644
new mode 100755
index 990433d..86a89b1
--- a/day01/count.sh
+++ b/day01/count.sh
@@ -9,7 +9,9 @@ cur_window=1
 
 declare -a windows
 
-for num in $(<input.txt); do
+filename="${1:-input.txt}"
+
+for num in $(<"$filename"); do
     cur_line=$((cur_line+1))
     windows[$cur_window]=$num
     if [ $cur_window -gt 1 ]; then