/**
knakul853
 */
class Solution {
public:
    bool isSameTree(TreeNode* p, TreeNode* q) {

        if(p == NULL || q == NULL)return p==q;

          if(p->val == q->val){

              return isSameTree(p->left, q->left) && isSameTree(p->right, q->right);

          }
        return false;

    }


};