#include<iostream>
using namespace std;
class Solution {
public:
int subtractProductAndSum(int n) {
int product = 1;
int sum = 0;
while (n != 0)
{
product *= (n % 10);
sum += (n % 10);
n /= 10;
}
return product - sum;
}
};
int main()
{
int n;
cin >> n;
Solution ss;
cout << ss.subtractProductAndSum(n) << "
";
return 0;
}