aoc VS adventofcode

❯ time make run cat input.txt | go run ./aoc12.go 2616490 2507471 make run 3.33s user 0.21s system 101% cpu 3.504 total ❯ ls -alh input.txt -rw-r--r--@ 1 erika staff 29M Dec 14 01:17 input.txt I had to change H, W := 8192, 8192, my Go program is on github

Here's is a GitHub link to my solution for today challenge.

My solution grows a sliding window over the input while scanning it. At any point, it ensures this window to be the largest possible with no repeating symbols. The underlying algorithm is:

Code on GitHub is currently a mess.

In the spirit of the Day 5 ALLEZ CUISINE! challenge to ELI5 (Explain Like I'm Five), here's a tasty explanation of how my algorithm works using only a large bucket of Red Vines and a knife. It says to use lined paper, but if you try this at home consider aligning things on a cutting board.

[Language: Jsonnet] (on GitHub)

Elixir code, thoughts

Elixir 1554/1502 code, reflections

Elixir 2506/3402 (24 minutes, 2 hours), code, thoughts

Bonus solution in Go (golang) because I was confused about why my Elixir solution didn't work and decided to implement from scratch in case I'd done something dumb. The Go one also got the wrong answer, but took less than 100ms instead of a minute, so I could try out lots of tweaks that didn't change the answer.

Elixir 2031/2641 after 3.25/6.5 hours! Code on GitHub

I spent time this afternoon sprucing up my helpers for the iex REPL. I spent a bunch of time poking at things in IEx the last couple days and wanted to make sure I would minimize keystrokes if I needed to debug things on my phone while drunk. Turns out Thursday night > Friday night > Saturday night in terms of difficulty, so all those macros have so far saved me zero seconds :-)