Advent of Code 2025 - Day 9

The hardest Part 2, I think! Read the full prompt. Part 1 The idea is we have a bunch of points on a grid, and need to find which pair of points would create the largest rectangle (imagine them defining opposite corners of a rectangle). The first thing that tripped me up was realising that these coordinates weren't on a continuous plane, and we needed to take into account the "size" of the point…