Day 15 should have been broken down. Or parts of it should have been earlier problems so by the time we got to day 15 it would be a time save to re-use code. I

Day 15 should have been broken down. Or parts of it should have been earlier problems so by the time we got to day 15 it would be a time save to re-use code. I personally try to follow the order of problems, but I'm still on day 15 and with the holidays, kids etc haven't had the mental capacity to sit down and work on it so I doubt I will finish things this year. I don't want to sound ungrateful though, I think the creator is doing an amazing service to software engineers/hobbyists everywhere and it's always fun to see solutions people come up with.