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Maximum Depth of Binary Tree 树的最大深度

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.

 

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 Tree Depth-first Search
 
/** * Definition for binary tree * struct TreeNode { *     int val; *     TreeNode *left; *     TreeNode *right; *     TreeNode(int x) : val(x), left(NULL), right(NULL) {} * }; */class Solution {public:    int maxDepth(TreeNode *root) {        if(root==NULL)            return 0;        int i=maxDepth(root->left)+1;        int j=maxDepth(root->right)+1;        return max(i,j);    }};

 

Maximum Depth of Binary Tree 树的最大深度