【剑指Offer】38二叉树的深度
题目描述
输入一棵二叉树,求该树的深度。从根结点到叶结点依次经过的结点(含根、叶结点)形成树的一条路径,最长路径的长度为树的深度。
时间限制:1秒;空间限制:32768K;本题知识点:树
解题思路
递归求解
# -*- coding:utf-8 -*-
# class TreeNode:
# def __init__(self, x):
# self.val = x
# self.left = None
# self.right = None
class Solution:
def TreeDepth(self, pRoot):
# write code here
if pRoot == None:
return 0
a,b,c = 0,0,0
if pRoot.left!= None:
a = self.TreeDepth(pRoot.left) + 1
if pRoot.right!= None:
b = self.TreeDepth(pRoot.right) + 1
if pRoot.left==None and pRoot.right== None:
c = 1
return max(a,b,c)