For the ninth December in a row, I’m playing with Advent of Code. Advent of Code is a series of 50 puzzles published by Eric Wastl, where you try to solve Christmas from some far-fetched horror. Every day from December 1st to December 25th, two puzzles become available, but the second is revealed only after you provide the answer to the first. In this post I will go over how you can solve them, and hopefully some interesting concepts along the way.