Sherman Hui 629848e372
[mypy] Fix type annotations in data_structures/binary_tree (#5518)
* fix: fix mypy errors

Update binary_search_tree `arr` argument to be typed as a list
within `find_kth_smallest` function

Update return type of `merge_two_binary_trees` as both inputs can
be None which means that a None type value can be returned from
this function

* updating DIRECTORY.md

Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
2021-10-22 16:07:05 +02:00
..
2021-09-07 13:37:03 +02:00
2021-10-19 21:39:15 +02:00
2021-09-07 13:37:03 +02:00