#!/usr/bin/env sh text=$(< 1-input) open=$(echo $text | tr -d ')' | wc -c) close=$(echo $text | tr -d '(' | wc -c) echo "Round 1:" $(($open - $close)) current=0 pos=1 while read -n1 char do case $char in "(" ) current=$(($current + 1)) ;; ")" ) current=$(($current - 1)) ;; esac if [ $current -lt 0 ] then break; fi pos=$(($pos + 1)) done < <(printf "%s" $text | tr -d '\n') echo "Round 2:" $pos