https://observablehq.com/@jwolondon/advent-of-code-2016-day-2?collection=@jwolondon/advent-of-code-2016
Advent of Code: 2016 Day 2 / Jo Wood | Observable
Jan 30, 2026 - See Bathroom Security. Part 1 What is the bathroom code? ? This is a nice example of a simple finite state machine (FSM), where that current state is the last...
advent of code 2016 day 2jo woodobservable