AoC day 9 wasn't exciting, but at least it wasn't tedious :) I did this one as soon as it was posted, using my C++ starter file, but it mostly got in the way, because the problem was simple. Should have just used C for this one 😅

(Days 7 and 8 were the only other two I did right as they were posted, and they were harder problems. I had used C++ on those two days, but not the others.)