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