C# solutions to the Advent of Code puzzles from 2020 and 2021
Prerequisites: installation of .NET 5.0 (or higher)
Usage (from main directory):
> dotnet build
> dotnet run YEAR DAY {1|2} [input_file]
If you're on windows, you can also just clone this into Visual Studio and specify the command line arguments there.
By default, the program reads from /[year]/[day]/input.txt. You can specify your own puzzle input by adding a file in the corresponding directory and referencing it as a command line argument.