Advent Of Code

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An unofficial home for the advent of code community on programming.dev! Other challenges are also welcome!

Advent of Code is an annual Advent calendar of small programming puzzles for a variety of skill sets and skill levels that can be solved in any programming language you like.

Everybody Codes is another collection of programming puzzles with seasonal events.

AoC 2025

Solution Threads

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console.log('Hello World')

founded 2 years ago

MODERATORS

Ategon@programming.dev

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CameronDev@programming.dev

hades@programming.dev

⚙️ - 2023 DAY 19 SOLUTIONS -⚙️ (programming.dev)

submitted 2 years ago* (last edited 2 years ago) by CameronDev@programming.dev to c/advent_of_code@programming.dev

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Day 19: Aplenty

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What is this?: Here is a post with a large amount of details: https://programming.dev/post/6637268
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[–] cacheson@kbin.social 2 points 2 years ago

Part 1 was pretty straightforward. For part 2 I made an ItemRange type that's just one integer range for each attribute. I also made a split function that returns two ItemRange objects, one for the values that match the specified rule, and the others for the unmatched values. When iterating through the workflows, I start a new recursion branch to process any matching values, and continue stepping through with the unmatched values until none remain or they're accepted/rejected.