/**
* Definition for a binary tree node.
* struct TreeNode {
* int val;
* TreeNode *left;
* TreeNode *right;
* TreeNode(int x) : val(x), left(NULL), right(NULL) {}
* };
*/
class Solution {
public:
TreeNode* searchBST(TreeNode* root, int val) {
if(!root) return NULL;
if(root->val == val) return root;
if(root->val > val) return searchBST(root->left,val);
return searchBST(root->right,val);
}
};
