#include <iostream>

using namespace std;

int main()
{
    int s = 0, d = 1;
    for (int i = 21; i < 51; ++i)
    {
        s += i;
    }
    for (int i = 1; i < 20; ++i)
    {
        d *= i;
    }
    cout << "S = " << s << ", D = " << d << endl;
    return 0;
}