Leetcode::Maximum Depth of Binary Tree 

 1 /**
 2  * Definition for binary tree
 3  * struct TreeNode {
 4  *     int val;
 5  *     TreeNode *left;
 6  *     TreeNode *right;
 7  *     TreeNode(int x) : val(x), left(NULL), right(NULL) {}
 8  * };
 9  */
10 class Solution {
11 public:
12     void Preorder( TreeNode *root, int &depth, int n )
13     {
14         if( root )
15         {
16             n++;
17             
18             if( root->left == NULL && root->right == NULL )
19             {
20                 if( n > depth )
21                 {
22                     depth = n;
23                 }
24                 return;
25             }
26             
27             if( root->left )
28             {
29                 Preorder( root->left,depth,n);
30             }
31             
32             if( root->right )
33             {
34                 Preorder( root->right,depth,n);
35             }
36         }
37     }
38     int maxDepth(TreeNode *root) {
39         // Start typing your C/C++ solution below
40         // DO NOT write int main() function
41         int depth = 0;
42         int n = 0;
43         Preorder(root,depth,n);
44         return depth;
45         
46     }
47 };

 

posted @ 2013-07-27 17:31  NinaGood  阅读(115)  评论(0)    收藏  举报