I’ll just update the one post this year. If I do more visualisations that is

Day 4 - Printing Department

or: Fun With Forklifts and Paper Rolls

Part 1 of this involves searching for a set of paper rolls in a map that can be “reached by a forklift”. It’s not really visualisation bait, not least of all because the answer you seek is really only the very first step of the Part 2 problem:

Day 4 Part 1 Solution

Part 2 is more interesting - iteratively remove the set of paper rolls until you can’t do any more. This is of course catnip to the visualisers, so obviously I had to have a go. Here’s an animation of the sequence of removal. My solution took 75 steps to complete the process; it starts off impressively with a large number of updates but as we get closer to the end it can be hard to visually track the small number of red dots indicating next-to-remove: