this post was submitted on 10 Dec 2025
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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.

EC 2025

AoC 2025

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console.log('Hello World')

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Day 10: Factory

Megathread guidelines

  • Keep top level comments as only solutions, if you want to say something other than a solution put it in a new post. (replies to comments can be whatever)
  • You can send code in code blocks by using three backticks, the code, and then three backticks or use something such as https://topaz.github.io/paste/ if you prefer sending it through a URL

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[โ€“] mr_satan@lemmy.zip 2 points 1 week ago

Python

I know I'm late to the party, but I fucking did it. Fuck this was hard. It didn't help me, that I decided not to use any external libs in my solutions. It does part two in ~5 s.

Yes, I'm proud of myself. No, the code is not good by any means.

The solution itself:

  1. Breadth first search with condition that every button will be pressed at most once;
  2. There were several approaches:
    • A* โ€” no luck;
    • What ever the fuck I did:
      1. Gauss-Jordan reduction;
      2. Simplex to optimize reduced problem, if previous step doesn't provide a full solution;
      3. On top of all that โ€” branch and bound search to resolve cases where optimization doesn't provide an integer solution.

Here's the link to my mess