Well, that was a month. Congrats everyone who has reached the end, and thanks to everyone who has contributed solutions and advice.
Sometime in January I will create a megathread for visualizations. If anyone has any other ideas, happy to hear them, otherwise, take a well earned 11 month rest until next year :D
It was nice to see some of the same faces (as it were) again from last year!
Also great to see more Haskell solutions, and props to those crazy enough to write in J and Uiua.