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# Advent of code 2024
-These are my solutions for Advent of Code in 2024. This year I'm using Lua as the programming language. To launch the program for a given day, run
+These are my solutions for Advent of Code in 2024. This year I'm using Guile
+Scheme as the programming language. To launch the program for a given day, run
```sh
./main <<ID>> [<<FILE>>]
```
-where `<<ID>>` is the day number followed by `a` for the first part or `b` for the second part. If the file is not specified, it defaults to the number of the day with two digits and extension `.in`, i.e. `01.in`. One can use the name of a file that doesn't exist, e.g. `-`, to read from standard input.
+where `<<ID>>` is the day number followed by `a` for the first part or `b` for
+the second part. If the file is not specified, it defaults to the number of the
+day with two digits and extension `.in`, i.e. `01.in`. To read from standard
+input, use `-` as the file name.
Example:
```sh
-./main 01b input
+./main 05b -
```
+Some of the first days are written in Lua rather than Guile Scheme. To run
+them, simply replace `main` with `main.lua`.