Name		Name	Last commit message	Last commit date
parent directory ..
BinarySearch		BinarySearch
backtrack		backtrack
structure		structure
BallGame.py		BallGame.py
CombinationSum.py		CombinationSum.py
CustomSortString.py		CustomSortString.py
DetectLoopInList.py		DetectLoopInList.py
Factorial.py		Factorial.py
FindDuplicatesInArray.py		FindDuplicatesInArray.py
FindFirstLastPositionInSortedArray.py		FindFirstLastPositionInSortedArray.py
FindKthLargest.py		FindKthLargest.py
FindLargestValue.py		FindLargestValue.py
KeysAndRooms.py		KeysAndRooms.py
LowestCommonAncesstor.py		LowestCommonAncesstor.py
MaxAreaIsland.py		MaxAreaIsland.py
MaxBinaryTree.py		MaxBinaryTree.py
NumberOfIsland.py		NumberOfIsland.py
Pipfile		Pipfile
Pipfile.lock		Pipfile.lock
README.md		README.md
SingleElementInSortedArray.py		SingleElementInSortedArray.py

README.md

Leetcode challenge in python

learn basic data structure and practice in python

def preorder(root):
    if root:
        return [root.val] + preorder(root.left) + preorder(root.right) 
    else:
        return []

    pipenv install
    pipenv shell