Advent of Code 2025 My solutions for Advent of Code 2025. Challenges Day 1: Secret Entrance Day 2: Gift Shop Day 3: Lobby Day 4: Printing Department Day 5: Cafeteria Day 6: Trash Compactor Day 7: Laboratories Day 8: Playground Day 9: Movie Theater Day 10: Factory Day 11: Reactor Day 12: Christmas Tree Farm