aoc21

module

v0.0.0-...-6033144 Latest Latest Go to latest Published: Apr 25, 2026 License: MIT

Details

Valid go.mod file
Redistributable license
Tagged version
Stable version
Learn more about best practices

Repository

github.com/ajdnik/aoc21

Links

Open Source Insights

README ¶

Advent of Code 2021

Solutions for Advent of Code 2021 in Go.

Project Structure

cmd/dayXX/         - Entry points for each day
internal/dayXX/    - Solution logic and tests
input/             - Puzzle input files
utils/             - Shared utilities (parsing, math helpers)

Prerequisites

Go 1.22+
golangci-lint (for linting)

Usage

Run a solution

make run DAY=01

Run tests

make test

Format and lint

make fmt
make lint

Run all checks

make all

Directories ¶

Path	Synopsis
cmd
day01 command
day02 command
day03 command
day04 command
day05 command
day06 command
day07 command
day08 command
day09 command
day10 command
day11 command
day12 command
day13 command
day14 command
day15 command
day16 command
day17 command
day18 command
day19 command
day20 command
day21 command
day22 command
day23 command
day24 command
day25 command
internal
day01 Package day01 solves AoC 2021 day 1: Sonar Sweep.	Package day01 solves AoC 2021 day 1: Sonar Sweep.
day02 Package day02 solves AoC 2021 day 2: Dive! Navigate a submarine using forward/up/down commands.	Package day02 solves AoC 2021 day 2: Dive! Navigate a submarine using forward/up/down commands.
day03 Package day03 solves AoC 2021 day 3: Binary Diagnostic.	Package day03 solves AoC 2021 day 3: Binary Diagnostic.
day04 Package day04 solves AoC 2021 day 4: Giant Squid.	Package day04 solves AoC 2021 day 4: Giant Squid.
day05 Package day05 solves AoC 2021 day 5: Hydrothermal Venture.	Package day05 solves AoC 2021 day 5: Hydrothermal Venture.
day06 Package day06 solves AoC 2021 day 6: Lanternfish.	Package day06 solves AoC 2021 day 6: Lanternfish.
day07 Package day07 solves AoC 2021 day 7: The Treachery of Whales.	Package day07 solves AoC 2021 day 7: The Treachery of Whales.
day08 Package day08 solves AoC 2021 day 8: Seven Segment Displays.	Package day08 solves AoC 2021 day 8: Seven Segment Displays.
day09 Package day09 solves AoC 2021 day 9: Smoke Basin.	Package day09 solves AoC 2021 day 9: Smoke Basin.
day10 Package day10 solves AoC 2021 day 10: Syntax Scoring.	Package day10 solves AoC 2021 day 10: Syntax Scoring.
day11 Package day11 solves AoC 2021 day 11: Dumbo Octopus.	Package day11 solves AoC 2021 day 11: Dumbo Octopus.
day12 Package day12 solves AoC 2021 day 12: Passage Pathing.	Package day12 solves AoC 2021 day 12: Passage Pathing.
day13 Package day13 solves AoC 2021 day 13: Transparent Origami.	Package day13 solves AoC 2021 day 13: Transparent Origami.
day14 Package day14 solves AoC 2021 day 14: Extended Polymerization.	Package day14 solves AoC 2021 day 14: Extended Polymerization.
day15 Package day15 solves AoC 2021 day 15: Chiton.	Package day15 solves AoC 2021 day 15: Chiton.
day16 Package day16 solves AoC 2021 day 16: Packet Decoder.	Package day16 solves AoC 2021 day 16: Packet Decoder.
day17 Package day17 solves AoC 2021 day 17: Trick Shot.	Package day17 solves AoC 2021 day 17: Trick Shot.
day18 Package day18 solves AoC 2021 day 18: Snailfish.	Package day18 solves AoC 2021 day 18: Snailfish.
day19 Package day19 solves AoC 2021 day 19: Beacon Scanner.	Package day19 solves AoC 2021 day 19: Beacon Scanner.
day20 Package day20 solves AoC 2021 day 20: Trench Map.	Package day20 solves AoC 2021 day 20: Trench Map.
day21 Package day21 solves AoC 2021 day 21: Dirac Dice.	Package day21 solves AoC 2021 day 21: Dirac Dice.
day22 Package day22 solves AoC 2021 day 22: Reactor Reboot.	Package day22 solves AoC 2021 day 22: Reactor Reboot.
day23 Package day23 solves AoC 2021 day 23: Amphipod.	Package day23 solves AoC 2021 day 23: Amphipod.
day24 Package day24 solves AoC 2021 day 24: Arithmetic Logic Unit.	Package day24 solves AoC 2021 day 24: Arithmetic Logic Unit.
day25 Package day25 solves AoC 2021 day 25: Sea Cucumber.	Package day25 solves AoC 2021 day 25: Sea Cucumber.
utils Package utils provides shared parsing and math helpers used across puzzle solutions.	Package utils provides shared parsing and math helpers used across puzzle solutions.

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