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My solutions to the awesome puzzles of advent of code (see https://adventofcode.com/about).

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My solutions to the awesome puzzles of [advent of code](https://adventofcode.com/about).

### 2025 [SQL]

- **Day 10: Factory** [Solution](./2025/day-10_factory/solution.sql) / [Puzzle](https://adventofcode.com/2025/day/10)
- **Day 9: Movie Theater** (only Part 1) [Solution](./2025/day-09_movie-theater/solution.sql) / [Puzzle](https://adventofcode.com/2025/day/9)
- **Day 8: Playground** (only Part 1) [Solution](./2025/day-08_playground/solution.sql) / [Puzzle](https://adventofcode.com/2025/day/8)
- **Day 7: Laboratories** [Solution](./2025/day-07_laboratories/solution.sql) / [Puzzle](https://adventofcode.com/2025/day/7)
- **Day 6: Trash Compactor** [Solution](./2025/day-06_trash-compactor/solution.sql) / [Puzzle](https://adventofcode.com/2025/day/6)
- **Day 5: Cafeteria** [Solution](./2025/day-05_cafeteria/solution.sql) / [Puzzle](https://adventofcode.com/2025/day/5)
- **Day 4: Printing Department** [Solution](./2025/day-04_printing-department/solution.sql) / [Puzzle](https://adventofcode.com/2025/day/4)
- **Day 3: Lobby** [Solution](./2025/day-03_lobby/solution.sql) / [Puzzle](https://adventofcode.com/2025/day/3)
- **Day 2: Gift Shop** [Solution](./2025/day-02_gift-shop/solution.sql) / [Puzzle](https://adventofcode.com/2025/day/2)
- **Day 1: Secret Entrance** [Solution](./2025/day-01_secret-entrance/solution.sql) / [Puzzle](https://adventofcode.com/2025/day/1)

### 2024 [SQL]

See [this](https://github.com/LennartH/advent-of-code/tree/main/2024#2024-sql-with-duckdb) for some thoughts about using SQL for AoC and [here](https://github.com/LennartH/advent-of-code/tree/main/2024#running-a-solution)
about how to execute the SQL files.

- **Day 25: Code Chronicle** [Solution](./2024/day-25_code-chronicle/solution.sql) / [Puzzle](https://adventofcode.com/2024/day/25)
- **Day 24: Crossed Wires** [Solution](./2024/day-24_crossed-wires/solution.sql) / [Puzzle](https://adventofcode.com/2024/day/24)
- **Day 23: Lan Party** [Solution](./2024/day-23_lan-party/solution.sql) / [Puzzle](https://adventofcode.com/2024/day/23)
- **Day 22: Monkey Market** [Solution](./2024/day-22_monkey-market/solution.sql) / [Puzzle](https://adventofcode.com/2024/day/22)
- **Day 21: Keypad Conundrum** [Solution](./2024/day-21_keypad-conundrum/solution.sql) / [Puzzle](https://adventofcode.com/2024/day/21)
- **Day 20: Race Condition** [Solution](./2024/day-20_race-condition/solution.sql) / [Puzzle](https://adventofcode.com/2024/day/20)
- **Day 19: Linen Layout** [Solution](./2024/day-19_linen-layout/solution.sql) / [Puzzle](https://adventofcode.com/2024/day/19)
- **Day 18: RAM Run** [Solution](./2024/day-18_ram-run/solution.sql) / [Puzzle](https://adventofcode.com/2024/day/18)
- **Day 17: Chronospatial Computer** [Solution](./2024/day-17_chronospatial-computer/solution.sql) / [Puzzle](https://adventofcode.com/2024/day/17)
- **Day 16: Reindeer Maze** [Solution](./2024/day-16_reindeer-maze/solution.sql) / [Puzzle](https://adventofcode.com/2024/day/16)
- **Day 15: Warehouse Woes** (takes ~4 mins) [Solution](./2024/day-15_warehouse-woes/solution.sql) / [Puzzle](https://adventofcode.com/2024/day/15)
- **Day 14: Restroom Redoubt** [Solution](./2024/day-14_restroom-redoubt/solution.sql) / [Puzzle](https://adventofcode.com/2024/day/14)
- **Day 13: Claw Contraption** [Solution](./2024/day-13_claw-contraption/solution.sql) / [Puzzle](https://adventofcode.com/2024/day/13)
- **Day 12: Garden Groups** [Solution](./2024/day-12_garden-groups/solution.sql) / [Puzzle](https://adventofcode.com/2024/day/12)
- **Day 11: Plutonian Pebbles** [Solution](./2024/day-11_plutonian-pebbles/solution.sql) / [Puzzle](https://adventofcode.com/2024/day/11)
- **Day 10: Hoof It** [Solution](./2024/day-10_hoof-it/solution.sql) / [Puzzle](https://adventofcode.com/2024/day/10)
- **Day 9: Disk Fragmenter** [Solution](./2024/day-09_disk-fragmenter/solution.sql) / [Puzzle](https://adventofcode.com/2024/day/9)
- **Day 8: Resonant Collinearity** [Solution](./2024/day-08_resonant-collinearity/solution.sql) / [Puzzle](https://adventofcode.com/2024/day/8)
- **Day 7: Bridge Repair** [Solution](./2024/day-07_bridge-repair/solution.sql) / [Puzzle](https://adventofcode.com/2024/day/7)
- **Day 6: Guard Gallivant** [Solution](./2024/day-06_guard-gallivant/solution.sql) / [Puzzle](https://adventofcode.com/2024/day/6)
- **Day 5: Print Queue** [Solution](./2024/day-05_print-queue/solution.sql) / [Puzzle](https://adventofcode.com/2024/day/5)
- **Day 4: Ceres Search** [Solution](./2024/day-04_ceres-search/solution.sql) / [Puzzle](https://adventofcode.com/2024/day/4)
- **Day 3: Mull It Over** [Solution](./2024/day-03_mull-it-over/solution.sql) ([without regex](./2024/day-03_mull-it-over/regex_bad.sql)) / [Puzzle](https://adventofcode.com/2024/day/3)
- **Day 2: Red-Nosed Reports** [Solution](./2024/day-02_red-nosed-reports/solution.sql) / [Puzzle](https://adventofcode.com/2024/day/2)
- **Day 1: Historian Hysteria** [Solution](./2024/day-01_historian-hysteria/solution.sql) / [Puzzle](https://adventofcode.com/2024/day/1)

### 2023 [TypeScript]

- **Day 25: Snowverload** (only Part 1) [Solution](./2023/src/day-25_snowverload/index.ts) / [Puzzle](https://adventofcode.com/2023/day/25)
- **Day 24: Never Tell Me The Odds** (only Part 1) [Solution](./2023/src/day-24_never-tell-me-the-odds/index.ts) / [Puzzle](https://adventofcode.com/2023/day/24)
- **Day 23: A Long Walk** [Solution](./2023/src/day-23_a-long-walk/index.ts) / [Puzzle](https://adventofcode.com/2023/day/23)
- **Day 22: Sand Slabs** [Solution](./2023/src/day-22_sand-slabs/index.ts) / [Puzzle](https://adventofcode.com/2023/day/22)
- **Day 21: Step Counter** [Solution](./2023/src/day-21_step-counter/index.ts) / [Puzzle](https://adventofcode.com/2023/day/21)
- **Day 20: Pulse Propagation** [Solution](./2023/src/day-20_pulse-propagation/index.ts) / [Puzzle](https://adventofcode.com/2023/day/20)
- **Day 19: Aplenty** [Solution](./2023/src/day-19_aplenty/index.ts) / [Puzzle](https://adventofcode.com/2023/day/19)
- **Day 18: Lavaduct Lagoon** [Solution](./2023/src/day-18_lavaduct-lagoon/index.ts) / [Puzzle](https://adventofcode.com/2023/day/18)
- **Day 17: Clumsy Crucible** [Solution](./2023/src/day-17_clumsy-crucible/index.ts) / [Puzzle](https://adventofcode.com/2023/day/17)
- **Day 16: The Floor Will Be Lava** [Solution](./2023/src/day-16_the-floor-will-be-lava/index.ts) / [Puzzle](https://adventofcode.com/2023/day/16)
- **Day 15: Lens Library** [Solution](./2023/src/day-15_lens-library/index.ts) / [Puzzle](https://adventofcode.com/2023/day/15)
- **Day 14: Parabolic Reflector Dish** [Solution](./2023/src/day-14_parabolic-reflector-dish/index.ts) / [Puzzle](https://adventofcode.com/2023/day/14)
- **Day 13: Point Of Incidence** [Solution](./2023/src/day-13_point-of-incidence/index.ts) / [Puzzle](https://adventofcode.com/2023/day/13)
- **Day 12: Hot Springs** [Solution](./2023/src/day-12_hot-springs/index.ts) / [Puzzle](https://adventofcode.com/2023/day/12)
- **Day 11: Cosmic Expansion** [Solution](./2023/src/day-11_cosmic-expansion/index.ts) / [Puzzle](https://adventofcode.com/2023/day/11)
- **Day 10: Pipe Maze** [Solution](./2023/src/day-10_pipe-maze/index.ts) / [Puzzle](https://adventofcode.com/2023/day/10)
- **Day 9: Mirage Maintenance** [Solution](./2023/src/day-09_mirage-maintenance/index.ts) / [Puzzle](https://adventofcode.com/2023/day/9)
- **Day 8: Haunted Wasteland** [Solution](./2023/src/day-08_haunted-wasteland/index.ts) / [Puzzle](https://adventofcode.com/2023/day/8)
- **Day 7: Camel Cards** [Solution](./2023/src/day-07_camel-cards/index.ts) / [Puzzle](https://adventofcode.com/2023/day/7)
- **Day 6: Boat Race** [Solution](./2023/src/day-06_boat-race/index.ts) / [Puzzle](https://adventofcode.com/2023/day/6)
- **Day 5: Seed Map** [Solution](./2023/src/day-05_seed-map/index.ts) / [Puzzle](https://adventofcode.com/2023/day/5)
- **Day 4: Scratchcards** [Solution](./2023/src/day-04_scratchcards/index.ts) / [Puzzle](https://adventofcode.com/2023/day/4)
- **Day 3: Gear Ratios** [Solution](./2023/src/day-01_trebuchet-calibration/index.ts) / [Puzzle](https://adventofcode.com/2023/day/3)
- **Day 2: Cube Conundrum** [Solution](./2023/src/day-02_cube-conundrum/index.ts) / [Puzzle](https://adventofcode.com/2023/day/2)
- **Day 1: Trebuchet Calibration** [Solution](./2023/src/day-01_trebuchet-calibration/index.ts) / [Puzzle](https://adventofcode.com/2023/day/1)

### 2022 [TypeScript]

- **Day 21: Monkey Math** [Solution](./2022/src/day-21_monkey-math/index.ts) / [Puzzle](https://adventofcode.com/2022/day/21)
- **Day 20: Grove Positioning System** [Solution](./2022/src/day-20_grove-positioning-system/index.ts) / [Puzzle](https://adventofcode.com/2022/day/20)
- ~~**Day 19: Not Enough Minerals** [Solution](./2022/src/day-19_not-enough-minerals/index.ts) / [Puzzle](https://adventofcode.com/2022/day/19)~~
- **Day 18: Boiling Boulders** [Solution](./2022/src/day-18_boiling-boulders/index.ts) / [Puzzle](https://adventofcode.com/2022/day/18)
- **Day 17: Pyroclastic Flow** [Solution](./2022/src/day-17_pyroclastic-flow/index.ts) / [Puzzle](https://adventofcode.com/2022/day/17)
- **Day 16: Proboscidea Volcanium** [Solution](./2022/src/day-16_proboscidea-volcanium/index.ts) / [Puzzle](https://adventofcode.com/2022/day/16)
- **Day 15: Beacon Exclusion Zone** [Solution](./2022/src/day-15_beacon-exclusion-zone/index.ts) / [Puzzle](https://adventofcode.com/2022/day/15)
- **Day 14: Regolith Reservoir** [Solution](./2022/src/day-14_regolith-reservoir/index.ts) / [Puzzle](https://adventofcode.com/2022/day/14)
- **Day 13: Distress Signal** [Solution](./2022/src/day-13_distress-signal/index.ts) / [Puzzle](https://adventofcode.com/2022/day/13)
- **Day 12: Hill Climbing Algorithm** [Solution](./2022/src/day-12_hill-climbing-algorithm/index.ts) / [Puzzle](https://adventofcode.com/2022/day/12)
- **Day 11: Monkey in the Middle** [Solution](./2022/src/day-11_monkey-in-the-middle/index.ts) / [Puzzle](https://adventofcode.com/2022/day/11)
- **Day 10: Cathode-Ray Tube** [Solution](./2022/src/day-10_cathode-ray-tube.ts) / [Puzzle](https://adventofcode.com/2022/day/10)
- **Day 9: Rope Bridge** [Solution](./2022/src/day-9_rope-bridge.ts) / [Puzzle](https://adventofcode.com/2022/day/9)
- **Day 8: Treetop Tree House** [Solution](./2022/src/day-8_treetop-tree-house.ts) / [Puzzle](https://adventofcode.com/2022/day/8)
- **Day 7: No Space Left On Device** [Solution](./2022/src/day-7_no-space-left-on-device.ts) / [Puzzle](https://adventofcode.com/2022/day/7)
- **Day 6: Tuning Trouble** [Solution](./2022/src/day-6_tuning-trouble.ts) / [Puzzle](https://adventofcode.com/2022/day/6)
- **Day 5: Supply Stacks** [Solution](./2022/src/day-5_supply-stacks.ts) / [Puzzle](https://adventofcode.com/2022/day/5)
- **Day 4: Camp Cleanup** [Solution](./2022/src/day-4_camp-cleanup.ts) / [Puzzle](https://adventofcode.com/2022/day/4)
- **Day 3: Rucksack Reorganization** [Solution](./2022/src/day-3_rucksack_reorganization.ts) / [Puzzle](https://adventofcode.com/2022/day/3)
- **Day 2: Rock Paper Scissors** [Solution](./2022/src/day-2_rock-paper-scissors.ts) / [Puzzle](https://adventofcode.com/2022/day/2)
- **Day 1: Calorie Counting** [Solution](./2022/src/day-1_calorie-counting.ts) / [Puzzle](https://adventofcode.com/2022/day/1)

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