* Algorithm to get maximum path sum of a binary tree.
* [pre-commit.ci] auto fixes from pre-commit.com hooks
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* Added "TreeNode | None" as traverse method argument type hints to accept both
* [pre-commit.ci] auto fixes from pre-commit.com hooks
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* Added doctest for construct_tree and type hints for TreeNode
* Added type hint and doctest
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* Preformatted using black
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* Organized imports
* updating DIRECTORY.md
* Apply suggestion from @cclauss
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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Christian Clauss <cclauss@me.com>
Co-authored-by: cclauss <cclauss@users.noreply.github.com>
