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