* [mypy] fix type annotations for problem003/sol1 and problem003/sol3
* [mypy] fix type annotations for project euler problem007/sol2
* [mypy] fix type annotations for project euler problem008/sol2
* [mypy] fix type annotations for project euler problem009/sol1
* [mypy] fix type annotations for project euler problem014/sol1
* [mypy] fix type annotations for project euler problem 025/sol2
* [mypy] fix type annotations for project euler problem026/sol1.py
* [mypy] fix type annotations for project euler problem037/sol1
* [mypy] fix type annotations for project euler problem044/sol1
* [mypy] fix type annotations for project euler problem046/sol1
* [mypy] fix type annotations for project euler problem051/sol1
* [mypy] fix type annotations for project euler problem074/sol2
* [mypy] fix type annotations for project euler problem080/sol1
* [mypy] fix type annotations for project euler problem099/sol1
* [mypy] fix type annotations for project euler problem101/sol1
* [mypy] fix type annotations for project euler problem188/sol1
* [mypy] fix type annotations for project euler problem191/sol1
* [mypy] fix type annotations for project euler problem207/sol1
* [mypy] fix type annotations for project euler problem551/sol1
* Euler problem 551 sol 1: Reduce McCabe code complexity
As discussed in #2128
* fixup! Format Python code with psf/black push
Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
* Tighten up psf/black and flake8
* Fix some tests
* Fix some E741
* Fix some E741
* updating DIRECTORY.md
Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
* spelling corrections
* review
* improved documentation, removed redundant variables, added testing
* added type hint
* camel case to snake case
* spelling fix
* review
* python --> Python # it is a brand name, not a snake
* explicit cast to int
* spaces in int list
* "!= None" to "is not None"
* Update comb_sort.py
* various spelling corrections in documentation & several variables naming conventions fix
* + char in file name
* import dependency - bug fix
Co-authored-by: John Law <johnlaw.po@gmail.com>