ref: dd00e9c532abc7517bd7ca72c8e4db91bb2da821
parent: 40ec3aaf09824face187218f899494aef429a9c6
author: Ben Harris <bjh21@bjh21.me.uk>
date: Wed Jan 11 18:15:44 EST 2023
Integer overflow protection in Pattern Both for grid sizes and for clue values.