AdventOfCode VS aoc

Here's an example implementation in Rust, using rayon's parallel iterators to automatically distribute the computation of a range of hashes over all available cores. It solves both parts together in around 3 seconds on my M2 MacBook Pro. Single-threaded, it takes around 25s in Rust and 35s in Python.

Here are mine: https://github.com/benediktwerner/AdventOfCode

I love doing optimizations like this but I don't really have enough time anymore to really do it. In 2020 I spent a fair amount of time writing super optimized solutions for the first 10 or so days (repo solving all those days together in 150us i.e. <1ms) but even back then, I eventually stopped since I had other things to do and it took more and more time as the days went on.

Python 3 116/125

Wow, my final solution looks almost exactly the same. Though I calculated my initial answers by hand.

That's certainly not necessary though and really not what makes most of the speed, especially for problems like today's. I don't really look at other leaderboard competitor's solutions much but at least my solutions (ranked ~20 today) are almost always completely vanilla Python (the only exception is networkx for the occasional graph problem but even that isn't really that much of a speedup if you know the common graph algorithms) and always self-contained.

Interesting approach. I guess mine could be considered a bit nicer, doing it recursively and returning the number to add to the left or right.

My priority Q/heap Dijkstra in Python runs just fine. I don't remember and can't check rn if it was instant or took a second but it definitely wasn't longer than that.

1076/1738 — Raw solution (to refactor/possibly rewrite)

Solution

Busy day today, going back to sleep zzZZZ. Clean solution and walkthrough here later today (hopefully).

If you're using Python, you can check this guy walkthroughs, he's good at explaining things and uses many Python's features to write clean code. I'd suggest to try tackle a problem on your own, and whether you manage to get a solution or not, read his walkthrough, and re-implement a solution using his ideas. This is what I did two years ago and it was a big help for me, I was more and more able to come up with solutions without looking at what he did. I still check what he does today, but I always solve the problem on my own first now.

758/2614 — Soluzione Python 3 — Walkthrough (inglese)

Solutions and walkthroughs for most of the years.

Congrats /u/skifire13 per il rank #233 globale, nice!