maximum-depth-of-binary-tree.py

# https://leetcode.com/problems/maximum-depth-of-binary-tree/

# Given a binary tree, find its maximum depth.

# Definition for a binary tree node.
# class TreeNode:
#     def __init__(self, x):
#         self.val = x
#         self.left = None
#         self.right = None


def maxDepth(self, root):
    """
    :type root: TreeNode
    :rtype: int
    """
    if not root:
        return 0
    return 1 + max(self.maxDepth(root.left), self.maxDepth(root.right))