If I wake up in the middle of the night, I'll glan...

# advent-of-code

[todd.ginsberg]

If I wake up in the middle of the night, I'll glance at the problem on my phone (it comes out at 23:00 my time) and usually wake up with a way I want to do it. Usually I know right away how I want to do it. Like today, I knew it was a variant on the change counting problem, so it would be recursive.