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leetcode------Maximum Depth of Binary Tree

标题:Maximum Depth of Binary Tree

通过率:

44.2%
难度:简单

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

利用递归的思路,遍历分别遍历左右子树,每次判断左右子树哪个深,返回深的一方便是二叉树的深度,具体代码如下:

 1 /** 2  * Definition for binary tree 3  * public class TreeNode { 4  *     int val; 5  *     TreeNode left; 6  *     TreeNode right; 7  *     TreeNode(int x) { val = x; } 8  * } 9  */10 public class Solution {11     public int maxDepth(TreeNode root) {12         int depth1=0;13         int depth2=0;14         if(root==null) return 0;15         //left16         depth1=maxDepth(root.left);17         depth2=maxDepth(root.right);18         if(depth1>depth2)19             return depth1+1;20             else21                 return depth2+1;22     }23 }

 

leetcode------Maximum Depth of Binary Tree