Added readme

README.md

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+# Algol of Code
+
+My solutions for AoC 2021
+
+## Requirements
+- `GNU MARST Algol-to-C Translator`
+- `gcc` (to change the C compiler used change `./compile.sh`)
+
+## Running the solutions
+
+First run
+```shell
+./prepare.sh
+```
+Run it after each change to `./src/util.a60` to rebuild `./obj/util.o`
+
+To compile a solution run
+```shell
+./compile.sh dayNN
+```
+substituting `dayNN` with the correct day.
+
+To run the solution with the day's data in `./data/dayNN.txt`
+```shell
+./run.sh dayNN
+```