Advent of Code 2025 - Day 1

Advent of Code is nearly over for this year and I thought I would try and do some quick write-ups of my solutions, mainly as a bit of fun and to help me improve my writing a little bit. So far it's been quite a good level of difficulty, with nothing outstandingly horrendous, but a few which have been challenging. I don't know whether the plan is to scale Days 1-12 in such a way that Day 12 is as…