This is my code for advent of code 2020.
It's quick and dirty code, unoptimized, slow, with no comments, no error handling, bad naming of both variables and functions
Probably I reinvented the wheel countless times in this code but... who cares?
When I wrote this, only God and I understood what I was doing
Now, God only knows
Every script solves one puzzle and expects to receive the puzzle input via STDIN.
The puzzle input must be provided exactly as provided by advent of code site: no additional leading/trailing spaces/newlines/carriage return/other stuff
Every script outputs the solution and a trailing newline character.
This is a command line example to solve a puzzle:
cat 1.input.txt | perl 1-part-one.pl