Advent Of Code 2021

Advent of Code 2021 solutions written in Rust 🦀 .

Advent of Code 2021 Story

You're minding your own business on a ship at sea when the overboard alarm goes off! You rush to see if you can help. Apparently, one of the Elves tripped and accidentally sent the sleigh keys flying into the ocean!

Before you know it, you're inside a submarine the Elves keep ready for situations like this. It's covered in Christmas lights (because of course it is), and it even has an experimental antenna that should be able to track the keys if you can boost its signal strength high enough; there's a little meter that indicates the antenna's signal strength by displaying 0-50 stars.

Your instincts tell you that in order to save Christmas, you'll need to get all fifty stars by December 25th.

Solutions

Problem	Solution	#1	#1 Answer	#2	#2 Answer
Day 1: Report Repair	day01.rs	✓	1559	✓	1600
Day 2: Dive!	day02.rs	✓	1488669	✓	1176514794
Day 3: Binary Diagnostic	day03.rs	✓	1540244	✓	4203981
Day 4: Giant Squid	day04.rs	✓	8136	✓	12738
Day 5: Hydrothermal Venture	day05.rs	✓	7468	✓	22364
Day 6: Lanternfish	day06.rs	✓	389726	✓	1743335992042
Day 7: The Treachery of Whales	day07.rs	✓	335330	✓	92439766
Day 8: Seven Segment Search	day08.rs	✓	369	✓	1031553
Day 9: Smoke Basin	day09.rs	✓	550	✓	1100682
Day 10: Syntax Scoring	day10.rs	✓	296535	✓	4245130838
Day 11: Dumbo Octopus	day11.rs	✓	1700	✓	273
Day 12: Passage Pathing	day12.rs
Day 13: Transparent Origami	day13.rs
Day 14: Extended Polymerization	day14.rs
Day 15: Chiton	day15.rs
Day 16: Packet Decoder	day16.rs
Day 17: Trick Shot	day17.rs
Day 18: Snailfish	day18.rs
Day 19: Beacon Scanner	day19.rs
Day 20: Trench Map	day20.rs
Day 21: Dirac Dice	day21.rs
Day 22: Reactor Reboot	day22.rs
Day 23: Amphipod	day23.rs
Day 24: Arithmetic Logic Unit	day24.rs
Day 25: Sea Cucumber	day25.rs