advent-of-code-2021

Here are my solutions for Advent of Code 2021.

This year, I chose to write my solutions using Go 1.18 with generics (by building the Go compiler from the latest master branch):

$ go version
go version devel go1.18-deb988a286 Fri Dec 3 18:09:19 2021 +0000 linux/amd64

Benchmarks

Benchmarks were run on an Intel i7 laptop running Linux Mint 19.3.

Puzzle	Benchmark	Iters	ns/op
day01/part1	BenchmarkInput-4	8048	144071 ns/op
day01/part2	BenchmarkInput-4	6345	160099 ns/op
-------------	--------------------	---------	-------------------
day02/part1	BenchmarkInput-4	7518	142567 ns/op
day02/part2	BenchmarkInput-4	7508	140629 ns/op
-------------	--------------------	---------	-------------------
day03/part1	BenchmarkInput-4	24511	43900 ns/op
day03/part2	BenchmarkInput-4	5559	191525 ns/op
-------------	--------------------	---------	-------------------
day04/part1	BenchmarkInput-4	270	3782730 ns/op
day04/part2	BenchmarkInput-4	310	3772155 ns/op
-------------	--------------------	---------	-------------------
day05/part1	BenchmarkInput-4	26	44208473 ns/op
day05/part2	BenchmarkInput-4	13	88025595 ns/op
-------------	--------------------	---------	-------------------
day06/part1	BenchmarkInput-4	14320	77127 ns/op
day06/part2	BenchmarkInput-4	5192	212946 ns/op
-------------	--------------------	---------	-------------------
day07/part1	BenchmarkInput-4	340	3504080 ns/op
day07/part2	BenchmarkInput-4	288	4131633 ns/op
-------------	--------------------	---------	-------------------
day08/part1	BenchmarkInput-4	11214	107337 ns/op
day08/part2	BenchmarkInput-4	630	1870067 ns/op
-------------	--------------------	---------	-------------------
day09/part1	BenchmarkInput-4	595	2000520 ns/op
day09/part2	BenchmarkInput-4	297	4048426 ns/op
-------------	--------------------	---------	-------------------
day10/part1	BenchmarkInput-4	8643	119493 ns/op
day10/part2	BenchmarkInput-4	8388	127750 ns/op
-------------	--------------------	---------	-------------------
day11/part1	BenchmarkInput-4	874	1359490 ns/op
day11/part2	BenchmarkInput-4	324	3681322 ns/op
-------------	--------------------	---------	-------------------
day12/part1	BenchmarkInput-4	27	39919589 ns/op
day12/part2	BenchmarkInput-4	1	1396313129 ns/op
-------------	--------------------	---------	-------------------
day13/part1	BenchmarkInput-4	3220	344567 ns/op
day13/part2	BenchmarkInput-4	1161	865072 ns/op
-------------	--------------------	---------	-------------------
day14/part1	BenchmarkInput-4	376	3065596 ns/op
day14/part2	BenchmarkInput-4	1483	740865 ns/op
-------------	--------------------	---------	-------------------
day15/part1	BenchmarkInput-4	32	37535837 ns/op
day15/part2	BenchmarkInput-4	1	1414612059 ns/op
-------------	--------------------	---------	-------------------
day16/part1	BenchmarkInput-4	8124	134785 ns/op
day16/part2	BenchmarkInput-4	7513	136187 ns/op
-------------	--------------------	---------	-------------------
day17/part1	BenchmarkInput-4	1644	723567 ns/op
day17/part2	BenchmarkInput-4	1454	816308 ns/op
-------------	--------------------	---------	-------------------
day18/part1	BenchmarkInput-4	390	3518750 ns/op
day18/part2	BenchmarkInput-4	81	13735733 ns/op
-------------	--------------------	---------	-------------------
day19/part1	BenchmarkInput-4	8	139914205 ns/op
day19/part2	BenchmarkInput-4	8	141170683 ns/op
-------------	--------------------	---------	-------------------
day20/part1	BenchmarkInput-4	146	8597374 ns/op
day20/part2	BenchmarkInput-4	3	435822786 ns/op
-------------	--------------------	---------	-------------------
day21/part1	BenchmarkInput-4	21853	59397 ns/op
day21/part2	BenchmarkInput-4	2	854468106 ns/op
-------------	--------------------	---------	-------------------
day22/part1	BenchmarkInput-4	7	161074391 ns/op
day22/part2	BenchmarkInput-4	1	91770973916 ns/op
-------------	--------------------	---------	-------------------
day23/part1	BenchmarkInput-4	1	19647640120 ns/op
day23/part2	BenchmarkInput-4	1	110287766926 ns/op
-------------	--------------------	---------	-------------------
day24/part1	BenchmarkInput-4	6079	400067 ns/op
day24/part2	BenchmarkInput-4	6079	400067 ns/op
-------------	--------------------	---------	-------------------
day25/part1	BenchmarkInput-4	1	1119637278 ns/op
-------------	--------------------	---------	-------------------

Several of the algorithms can be improved, obviously, but that was a lot of fun and you never stop learning when tackling the wide variety of challenges. Thank you for AOC, http://was.tl/ !

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License

Copyright 2021 Glenn M. Lewis. All Rights Reserved.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.