Play2022 VS adventofcode

Kotlin.

I'd recommend looking at other people's Kotlin code. Mine would be OK except that I use too many custom library calls. I recommend Todd Ginsberg's Kotlin solutions blog. He's very thorough in his discussion.

Here you go.

My submission code had the dubious distinction of working on the first try, but it was a tangled nightmare of when statements and bad ideas kludged on top of other bad ideas.

Kotlin

It's very useful to be able to benchmark with some kind of timer. I wrote a Stopwatch class for this purpose, but subtracting from System.nanoTime is easy and is the perfect thing to put in a template so you never have to deal with the boilerplate again.

Full code here.

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