advent-of-code VS AdventOfCode

So I spend more time analyzing the input calculation. I wrote up that analysis and committed it to my repository, too.

This was a bit difficult. My original part one solution worked completely differently to what I had to do for part two.

My solution in Common Lisp, 2335/2041.

No. It's just here, as part of my Advent of Code repository.

The code is at the bottom of my day 9 source file, in Common Lisp. (The AdvMAME3x code was something I originally wrote for my 2020 day 20 visualization.)

As a side note, I took inspiration from a post the other day about adding AoC badges to your repository README file. I use GitLab, which lets you define badges as properties of your repository. So I added badges to my repository's header area, driven by a JSON file in the repository. The JSON file is updated manually by a script. (I might add some automated updates at some point, but manual works okay for now.)

Probably overkill, because I parsed the instructions into instances of my point class. I tend to default to that for coordinates nowadays (as opposed to just using complex numbers) because it generically extends to arbitrary numbers of dimensions. Just in case.

The code is here: https://gitlab.com/asciiphil/advent-of-code/-/blob/master/2020/20.lisp It's in Common Lisp. There are quite a few hacks, copied-and-pasted code, and other blemishes. Toward the end, I just wanted to get something done, even if the code didn't turn out pretty.

My solution in Common Lisp.

For part two, I first tried rewriting my code with a circular list structure I wrote for Advent of Code 2018 day 9 (Marble Mania). I figured the mutable circular list implementation would be more performant. It was, but nowhere near enough.

I think I have the same solution as /u/jonathan_paulson (see his comment and his code)

135/99. Python. Video coming soon.

85/71. Python. Video of me solving. Takes 10s to do both parts in pypy3.

And e.g. Jonathan Paulson never uses any libraries and always starts basically from scratch.

46/40. Python

2/2! Best day so far! Python. Video of me solving.

Python. 154/251 :( Video of me solving.

Python. 30th on part 1; 15th on part 2. Video of me solving.

Python 39/229. Video of me solving. Rough day for me, including accidentally deleting all my code (!) during part 2, and misreading part 2.

Python 8/6th :) Video of me solving: https://youtu.be/e3_iiz_6bFw