Advent of Code 2023 day 5
Today was an interesting problem. We are basically given a map to follow based on a number, possibly transforming the number at each step. With a single number this is quite simple, just apply the rules and step through each set of transformations. The problem becomes tricky when it turns out we have to deal with enormous ranges of numbers. On the subreddit some people reported their implementation to take hours and use 20GB of memory.