Advent of Code (2018) Day Solution Day 1: Chronal Calibration Code Day 2: Inventory Management System Code Day 3: No Matter How You Slice It Code Day 4: Repose Record Code Day 5: Alchemical Reduction Code Day 6: Chronal Coordinates Code Day 7: The Sum of Its Parts Code Day 8: Memory Maneuver Code Day 9: Marble Mania Code Day 10: The Stars Align Code Day 11: Chronal Charge Code Day 12: Subterranean Sustainability Code Day 13: Mine Cart Madness Code Day 14: Chocolate Charts Code Day 15: Beverage Bandits Code Day 16: Chronal Classification Code Day 17: Reservoir Research Code Day 18: Settlers of The North Pole Code Day 19: Go With The Flow Code Day 20: A Regular Map Code Day 21: Chronal Conversion Code Day 22: Mode Maze Code Day 23: Experimental Emergency Teleportation Code Day 24: Immune System Simulator 20XX Code Day 25: Four-Dimensional Adventure Code