@xavdid does Advent of Code

Step-by-step puzzle explanations, written in Python, for Advent of Code puzzles.

advent-of-code.xavd.id ↗RSS feed ↗119 posts

Latest posts

David's AoC 2025 Day 3 Solution

David solves: Lobby

Jan 31, 2026

David's AoC 2025 Day 2 Solution

David solves: Gift Shop

Jan 27, 2026

David's AoC 2025 Day 1 Solution

David solves: Secret Entrance

Jan 12, 2026

David's AoC 2024 Day 16 Solution

David solves: Reindeer Maze

Aug 3, 2025

David's AoC 2024 Day 15 Solution

David solves: Warehouse Woes

Feb 15, 2025

David's AoC 2024 Day 14 Solution

David solves: Restroom Redoubt

Dec 27, 2024

David's AoC 2024 Day 13 Solution

David solves: Claw Contraption

Dec 25, 2024

David's AoC 2024 Day 12 Solution

David solves: Garden Groups

Dec 23, 2024

David's AoC 2024 Day 11 Solution

David solves: Plutonian Pebbles

Dec 17, 2024

David's AoC 2024 Day 10 Solution

David solves: Hoof It

Dec 13, 2024

David's AoC 2024 Day 9 Solution

David solves: Disk Fragmenter

Dec 12, 2024

David's AoC 2024 Day 8 Solution

David solves: Resonant Collinearity

Dec 9, 2024

David's AoC 2024 Day 7 Solution

David solves: Bridge Repair

Dec 7, 2024

David's AoC 2024 Day 6 Solution

David solves: Guard Gallivant

Dec 5, 2024

David's AoC 2024 Day 5 Solution

David solves: Print Queue

Dec 5, 2024

David's AoC 2024 Day 4 Solution

David solves: Ceres Search

Dec 4, 2024

David's AoC 2024 Day 3 Solution

David solves: Mull It Over

Dec 3, 2024

David's AoC 2024 Day 2 Solution

David solves: Red-Nosed Reports

Dec 2, 2024

David's AoC 2024 Day 1 Solution

David solves: Historian Hysteria

Nov 30, 2024

David's AoC 2023 Day 25 Solution

David solves: Snowverload

Nov 14, 2024

David's AoC 2023 Day 24 Solution

David solves: Never Tell Me The Odds

Nov 10, 2024

David's AoC 2023 Day 23 Solution

David solves: A Long Walk

Oct 29, 2024

David's AoC 2023 Day 22 Solution

David solves: Sand Slabs

Aug 24, 2024

David's AoC 2023 Day 21 Solution

David solves: Step Counter

Apr 17, 2024

David's AoC 2023 Day 20 Solution

David solves: Pulse Propagation

Feb 8, 2024

David's AoC 2023 Day 19 Solution

David solves: Aplenty

Dec 29, 2023

David's AoC 2023 Day 18 Solution

David solves: Lavaduct Lagoon

Dec 25, 2023

David's AoC 2023 Day 17 Solution

David solves: Clumsy Crucible

Dec 25, 2023

David's AoC 2023 Day 16 Solution

David solves: The Floor Will Be Lava

Dec 22, 2023

David's AoC 2023 Day 15 Solution

David solves: Lens Library

Dec 18, 2023

David's AoC 2023 Day 14 Solution

David solves: Parabolic Reflector Dish

Dec 17, 2023

David's AoC 2023 Day 13 Solution

David solves: Point of Incidence

Dec 15, 2023

David's AoC 2023 Day 12 Solution

David solves: Hot Springs

Dec 15, 2023

David's AoC 2023 Day 11 Solution

David solves: Cosmic Expansion

Dec 11, 2023

David's AoC 2023 Day 10 Solution

David solves: Pipe Maze

Dec 11, 2023

David's AoC 2023 Day 9 Solution

David solves: Mirage Maintenance

Dec 9, 2023

David's AoC 2023 Day 8 Solution

David solves: Haunted Wasteland

Dec 9, 2023

David's AoC 2023 Day 7 Solution

David solves: Camel Cards

Dec 7, 2023

David's AoC 2023 Day 6 Solution

David solves: Wait For It

Dec 5, 2023

David's AoC 2023 Day 5 Solution

David solves: If You Give A Seed A Fertilizer

Dec 5, 2023

David's AoC 2023 Day 4 Solution

David solves: Scratchcards

Dec 3, 2023

David's AoC 2023 Day 3 Solution

David solves: Gear Ratios

Dec 3, 2023

David's AoC 2023 Day 2 Solution

David solves: Cube Conundrum

Dec 1, 2023

David's AoC 2023 Day 1 Solution

David solves: Trebuchet?!

Nov 30, 2023

David's AoC 2022 Day 25 Solution

David solves: Full of Hot Air

Aug 3, 2023

David's AoC 2022 Day 19 Solution

David solves: Not Enough Minerals

Jul 31, 2023

David's AoC 2022 Day 24 Solution

David solves: Blizzard Basin

Jul 28, 2023

David's AoC 2022 Day 23 Solution

David solves: Unstable Diffusion

Jul 25, 2023

David's AoC 2022 Day 22 Solution

David solves: Monkey Map

Apr 16, 2023

David's AoC 2022 Day 21 Solution

David solves: Monkey Math

Feb 2, 2023