As a warmup for this year’s Advent of Code, I’m re-reading and posting my solutions to last year’s challenges. You can read, run and edit today’s solution by following the post link.

After a few days of gentle introductory challenges, things ramped up a little today. Not due to the difficulty of the puzzle itself, but the unhelpful way in which the input data was formatted :-). Given that increase in difficulty, I think a lot of people were expecting part 2 to be a Towers of Hanoi challenge, but no, it was just a simple change to part 1.