aoc2021 VS adventofcode

I've done something similar to this in Python before, but this time the completion aspect did throw a little wrinkle into it. That taught me some new stuff about slices, sorting, and idiomatic implementations of a stack in Go. Full source including tests available on Github.

In the spirit of "premature optimization is the root of all evil, I just brute forced it. The test suite ran in 70ms on my system so that was good enough for me not to worry about further optimization.

Yes! https://github.com/krmaxwell/aoc2021 organized by days.

Like most other folks, I did the naive approach for part 1 and then part 2 was untenable. Props to everyone who did the smart thing from the beginning. As always, my full code including tests is on Github.

This one kicked my ass for a while, which was confusing because the tests all passed fine with example data. Eventually I tracked down the problem to the way I was reading in the actual puzzle input... I should've known. Anyway, in addition to the [Github repo](https://github.com/krmaxwell/aoc2021/master/day4] with full tests and stuff, here's the core answer:

Same as yesterday, my answers using Go are on Github with a TDD-ish approach. I'm not being super strict with TDD here.

My solution for Day 1 is on GitHub. I think you may have made things significantly more complicated than needed.

I'm trying in Go this year, just because I'm working on learning it.

Part one went fairly fast, but spent quite some time on getting part two right. I settled on the approach of just iterating over the grid and using a boolean to see if I had to count elements or not. However, I had some issues figuring out when to swap, this post by /u/rogual helped me figure it out. After that I lost quite some time on an error that only occurred with my input, not with the example input. It turned out that my loop (which I take form my p1 solution) didn't include the start node, which caused all sorts of counting issues.

[Language: Elixir] https://github.com/mathsaey/adventofcode/blob/master/lib/2023/4.ex