struct TreeNode {
	int val;
	struct TreeNode *left;
	struct TreeNode *right;
	TreeNode(int x) :
			val(x), left(NULL), right(NULL) {
	}
};*/
class Solution {
public:
    int TreeDepth(TreeNode* pRoot) {
    if(!pRoot)
        return 0;
    int left=TreeDepth(pRoot->left)+1;
    int right=TreeDepth(pRoot->right)+1;
    //int max=left>right?left:right;
     //   return max;
    return std::max(left,right);
    }
};