Advent of Code 2021 This repository contains my solutions to Advent of Code 2021 in Python. Puzzle Solution Day 1: Sonar Sweep here Day 2: Dive! here Day 3: Binary Diagnostic here Day 4: Giant Squid here Day 5: Hydrothermal Venture here Day 6: Lanternfish here Day 7: The Treachery of Whales here Day 8: Seven Segment Search here