jeff, I've completed "A Long Walk" - Day 23 - Advent of Code 2023 #AdventOfCode #PHP
I'm still catching up after the Christmas break.
I lost a bit of time trying to optimize this one more than I really needed to.
https://github.com/jstanden/advent-of-code-php/blob/main/2023/23-long-walk/solution.php?ts=4