When my kids move out, one of my plans is to finally start the first Advent of Code.

Question is, when you write down the numbers of excuses and the number of things you could so each month, as in your input .... How many months do you have less excuses available than problems you could solve? Part 2: The kids want to check whether your algorithm works correctly. For that they have devised a formula: Position of the month in the input, multiplied with the number of problems not excusable to not solve, summed up for all months of the year. What is the checksum of your excuses - problems - report?

> But hey I didn't have the time to do it. Kids...

Yep, dont have the kids. And no plan to.

I'm firmly of the belief that no one should have kids unless they really really want them and are content with the sacrifice it entails, but also:

My kids have been the absolute best source of grey hairs in my life.