Day 22 of Advent of Code 2021 was all about cubes. The problem statement provided us with coordinates of cubes and an “on” or “off” instructions. These instructions needed to be carried out in order. The first part of the problem was deceptively simple. So much so that I didn’t go for the “obvious” solution initially because I thought it wouldn’t scale. As it happened I ended up implementing it anyway as my optimised approach wasn’t working because I made a simple mistake.
