1.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。
2.算法描述
利用二叉树的
。求左子树的高度,右子树的高度 ,然后返回
3.代码描述
3.1.Java代码
/**
public class TreeNode {
int val = 0;
TreeNode left = null;
TreeNode right = null;
public TreeNode(int val) {
this.val = val;
}
}
*/
public class Solution {
public int TreeDepth(TreeNode root) {
if(root == null)
return 0;
int leftDepth = TreeDepth(root.left);
int rightDepth = TreeDepth(root.right);
return Math.max(leftDepth, rightDepth) + 1;
}
}
3.2.Python代码
# -*- coding:utf-8 -*-
# class TreeNode:
# def __init__(self, x):
# self.val = x
# self.left = None
# self.right = None
class Solution:
def TreeDepth(self, pRoot):
if not pRoot:
return 0
leftDepth = self.TreeDepth(pRoot.left)
rightDepth = self.TreeDepth(pRoot.right)
return max(leftDepth, rightDepth) + 1