Day 3 brings battery banks and joltage calculations to restore emergency power to the escalator.
Python
Advent of Code 2025; Day 3: Lobby Advent of Code 2025; Day 2: Gift Shop Day 2 brings product ID validation puzzles and some surprising lessons about Python's string counting behaviour.
Advent of Code 2025; Day 1: Secret Entrance It's December, which means it's time to take a break from all the usual projects; it's time for the Advent of Code!