* add backtracking word search
* updating DIRECTORY.md
* [pre-commit.ci] auto fixes from pre-commit.com hooks
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* review notes fixes
* additional fixes
* add tests
* small cleanup
* [pre-commit.ci] auto fixes from pre-commit.com hooks
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* small cleanup 2
* [pre-commit.ci] auto fixes from pre-commit.com hooks
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* Update backtracking/word_search.py
Co-authored-by: Christian Clauss <cclauss@me.com>
* Update backtracking/word_search.py
Co-authored-by: Christian Clauss <cclauss@me.com>
* Update backtracking/word_search.py
Co-authored-by: Christian Clauss <cclauss@me.com>
* Update backtracking/word_search.py
Co-authored-by: Christian Clauss <cclauss@me.com>
Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Christian Clauss <cclauss@me.com>