Advent of Code 2020 day 16
Types and parsers, then using a library for the hard bit.
Recent posts
Advent of Code 2020 day 15
Diving into ST and monad loop control, all in the pursuit of speed
Advent of Code 2020 day 14
Bit-twiddling, until it wasn't.
Advent of Code 2020 day 13
Reusing number theory
Advent of Code 2020 day 12
Day 12 was fairly straighforward: apply a bunch of rules to update a state. The two parts are so similar, I'll treat them together here. I started with some data definitions, for Directions,
Advent of Code 2020 day 11
Cellular automata, and being inefficient