Readme

README.md

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+# Adevent of Code 2021
+
+So this is my collection of code for [Advent of Code 2021](https://adventofcode.com/2021).
+Expect hacky code that is not representative of my average code quality.
+
+Python solutions take input from `stdin`, so run like this:
+
+```shell
+cat input1.in | python3 3.py
+```
+
+Swift solutions take the filename as the first argument.
+
+```shell
+swift ./AoC1/main.swift input1.in
+```