include

using namespace std; int main() {

int a = 0;
int arr[] = { 1,2,3,4,5,6,7,8,9,10 };
int brr[9];
for (int i = 0; i < 9; i++)
{
	cin >> a;
	brr[i] = a;
}
for (int j = 0; j < 10; j++)
{
	for (int k = 0; k < 9; k++)
	{
		if (arr[j] == brr[k])
		{
			break;

		}
		else if (k == 8 && arr[j] != brr[k])
		{
			cout << "The missing integer is:" << arr[j];
			break;
		}
	}

}

return 0;

}