#100. Same Tree 题目链接
bool isSameTree(struct TreeNode* p, struct TreeNode* q) {
if(p==NULL&&q==NULL)
return true;
else if(p==NULL||q==NULL)
return false;
else if(p->val==q->val)
return isSameTree(p->left,q->left)*isSameTree(p->right,q->right);
else
return false;
}