Maximum Depth of Binary Tree

   

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.

/** * 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 maxLeft = maxDepth(root->left);        int maxRig = maxDepth(root->right);        return maxLeft > maxRig ? maxLeft + 1 : maxRig + 1;    }};