I'm almost done with #adventofcode, only have 21 part 2 and 24 part 2 left.

I had a really nice, elegant solution to 24 part 2 that I coded up all the way, and it even works on the sample input, but it doesn't actually work on the input because it doesn't quite have the right structure. I think I have another idea that should work, but it's so much less elegant.

21 part 2 I just am having a hard time caring about figuring out how to solve.