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
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binary_tree	[mypy] Fix type annotations in data_structures/binary_tree (#5518)	2021-10-22 16:07:05 +02:00
disjoint_set	Add type annotations (#4814)	2021-10-12 00:34:30 +08:00
hashing	Pyupgrade to Python 3.9 (#4718)	2021-09-07 13:37:03 +02:00
heap	Pyupgrade to Python 3.9 (#4718)	2021-09-07 13:37:03 +02:00
linked_list	[mypy] fix: fix mypy error in singly_linked_list.py (#5517)	2021-10-22 11:39:18 +08:00
queue	Replace double_ended_queue.py (#5429)	2021-10-21 11:38:04 +08:00
stacks	Pyupgrade to Python 3.9 (#4718)	2021-09-07 13:37:03 +02:00
trie	[mypy] fix: fix mypy error in trie.py(#5516)	2021-10-22 11:40:17 +08:00
__init__.py	Add __init__.py files in all the directories (#2503)	2020-09-28 19:42:36 +02:00