Lean 99: Ninety-Nine Lean Problems

These are Lean translations of Ninety-Nine Haskell Problems, which are themselves translations of Ninety-Nine Lisp Problems.

Contributing

All contributions are wellcome! This repository uses external libraries as follows:

• Generate HTML from .md files using mdbook.
• Generate .md files from .lean files in the build directory using mdgen.
• The Lean files in the Src folder contain the answers to the questions. The answers are deleted using the mk-exercise and output to the build folder.

To contribute to this repository, please follow these steps.

1. Create a new branch.
2. Edit the Lean files in the Src folder.
3. Edit SUMMARY.md if you are going to add new pages.
4. Run lake run build.
5. To view the preview, run mdbook serve --open. Don't forget to run lake run build after modifying the .lean file in the Src directory.
6. Commit the changes and open a pull request!