Arunsiva003 patch 1 flatten tree (#9695)

* infix to prefix missing feature added

* infix to prefix missing feature added

* infix to prefix missing feature added

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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* infix to prefix missing feature added (comments)

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* infix to prefix missing feature added (comments)

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* newly updated infix_to_prefix

* newly updated infix_to_prefix_2

* newly updated infix_to_prefix_3

* from the beginning

* Created flatten_binarytree_to_linkedlist.py

* Update flatten_binarytree_to_linkedlist.py

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Update flatten_binarytree_to_linkedlist.py

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Update flatten_binarytree_to_linkedlist.py

* Update flatten_binarytree_to_linkedlist.py

* Update flatten_binarytree_to_linkedlist.py

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Update flatten_binarytree_to_linkedlist.py (space added)

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Update flatten_binarytree_to_linkedlist.py space added

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Update flatten_binarytree_to_linkedlist.py

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* flatten binary tree to linked list - 1

* flatten binary tree to linked list final

* flatten binary tree to linked list final

* review updated

* Update flatten_binarytree_to_linkedlist.py

* Update .pre-commit-config.yaml

* Update flatten_binarytree_to_linkedlist.py

* Update flatten_binarytree_to_linkedlist.py

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Co-authored-by: ArunSiva <[email protected]>
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Christian Clauss <[email protected]>