I had a not so great solution that took about 30 minutes to run, but since I was busy with Christmas things I'd run it, go about my things, stop by the computer

I had a not so great solution that took about 30 minutes to run, but since I was busy with Christmas things I'd run it, go about my things, stop by the computer later, fix a tiny mistake, and run it again. I kept thinking about cleaner ways to solve it, this was hard one.