Advent Of Code

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An unofficial home for the advent of code community on programming.dev!

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.

AoC 2024

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🌉 - 2024 DAY 7 SOLUTIONS - 🌉 (programming.dev)

submitted 2 weeks ago by [email protected] to c/[email protected]

46 comments fedilink hide all child comments

Day 7: Bridge Repair

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[–] [email protected] 0 points 2 weeks ago (1 children)

Thanks to your solution I learned more about how to use reduce :D

My solution did work for the example input but not for the actual one. When I went here and saw this tiny code block and you saying

This turned out to be reasonably easy

I was quite taken aback. And it's so much better performance-wise too :D (well, until part 2 comes along in my case. Whatever this black magic is you used there is too high for my fried brain atm)

[–] [email protected] 0 points 2 weeks ago (1 children)

Haha, sorry about that, it does seem quite smug :-) I went into it expecting it to be a nightmare of boxes and dimensions, but finding it something I could deal with was a massive relief. Of course once I had a working solution I reversed it back into a multi-dimensional nightmare. That's where the performance gains came from: about 10x speedup from letting Uiua build up as many dimensions as it needed before doing a final deshaping.

I enjoyed reading a different approach to this, and thanks for reminding me that ⋕$"__" exists, that's a great idiom to have up your sleeve.

Let me know if there's any bits of my solution that you'd like me to talk you through.

[–] [email protected] 0 points 2 weeks ago

No worries, it does seem a lot less difficult in hindsight now, my mind just blanked at what I expected to be a lot more code :))

That performance improvement is amazing, I'll definitely take a look at how that works in detail later. Just gotta recover from the mental stretch gymnastics trying to remember the state of the stack at different code positions