* Tighten up psf/black and flake8 * Fix some tests * Fix some E741 * Fix some E741 * updating DIRECTORY.md Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
* added sol3.py for problem_20 * added sol4.py for problem_06 * ran `black .` on `\Python`
* Create dinic.py Dinic's algorithm for maximum flow * Update dinic.py Changes made.