100. Same Tree.cpp

class Solution {
public:
    bool isSameTree(TreeNode* p, TreeNode* q) {
        if(p == NULL && q == NULL)
            return true;
         else if(p == NULL || q== NULL)
            return false;
      return    (p->val== q->val && isSameTree(p->left,q->left) && 
                 isSameTree(p->right,q->right));
          
    }
};