Advent of Code 2021 Puzzles https://adventofcode.com/2021
Day 1: Sonar sweep Detect the depths around the submarine.
Day 2: Dive! Piloting the submarine.
Day 3: Binary Diagnostic Calculate gamma rate and epsilon rate. Calculate oxygen generator rating and C02 scrubber rating.
Day 4: Giant Squid Play bingo with a Giant Squid. Play to win, or play to let the squid win.
Day 5: Hydrothermal Venture Map hydrothermal vents.
Day 6: Lanternfish Exponential growth.
Day 7: The Treachery of Whales Align your crabs in the most efficient manner.
Day 8: Seven Segment Search Rewire scrambled circuits to LEDs.
Day 9: Smoke Basin Find low points and basin sizes.
Day 10: Syntax Scoring Find and score corrupted or incomplete syntaxes.
Day 11: Dumbo Octopus Flashing octopuses, similar to game of Life.
Day 12: Passage Pathing Find your way through a series of caves.
Day 13: Transparent Origami Fold a transparent sheet of paper to get access code.
Day 14: Extended Polymerization Exponential growth of polymers. Find the most and least common elements.
Day 15: Chiton Find the least risky path through the cave using Dijkstra's algorithm.
Day 16: Packet Decoder Decode packets within packets from a stream of bits defined in hexadecimal.
Day 17: Trick Shot Launch probes into a trench. How high can you go? How many ways?
Day 18: Snailfish Do the Snailfish homework. But what to use, trees, lists, treelists?
Day 19: Beacon Scanner Piece together a map of all beacons by indentify overlaps. Location, location location.
Day 20: Trench Map Image enhancement of infinite sized picture. Like the game of Life.
Day 21: Dirac Dice God does not play dice, but when he does he plays Dirac Dice
Day 22: Reactor Reboot Interesecting cubes are turned on or off.
Day 23: Amphipod Play tower of Hanoi with Amphipods.
Day 24: Arithmetic Logic Unit Find the largest and smallest valid model numbers.
Day 25: Sea Cucumber Eastbound and Southbound Sea Cucumbers collide.