include <bits/stdc++.h>

using namespace std;

int main() {

int n, sum = 0;
cin >> n;
if (n == 0) {
	cout << "1";
	return 0;
}
while (n) {

	int sum1 = 1;
	int x = n % 10;
	for (int i = 1; i <= x; i++) {
		sum1 *= i;
	}
	sum += sum1;
	n /= 10;
}
cout << sum;
return 0;

}