Leetcode刷题记录[python]——104 Maximum Depth of Binary Tree

一、前言

  对于这类抽象问题还有self用法,还要多做多练习,此题是参考其他答案所做。

二、题104 Maximum Depth of Binary Tree

  Given a binary tree, find its maximum depth.

  The maximum depth is the number of nodes along the longest path from the root node down to the farthest leaf node.

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

class Solution(object):
    def maxDepth(self, root):
        """
        :type root: TreeNode
        :rtype: int
        """
        if root==None:
            return 0
        return max(self.maxDepth(root.left),self.maxDepth(root.right))+1

  思路:分别遍历根节点的左右子树(p.s.根节点是相对而言的,不只是最初的根节点),遍历一层,加一,比较左右结果大小,最后结果再加一。

  不知道说的对不对,如有误,以后了解更透彻了再更正。

原文地址:https://www.cnblogs.com/Myoungs/p/5509695.html