#include <iostream>
#include <iomanip>

using namespace std;

unsigned long long factorial (unsigned int n);
  
int main() {
    int i;

    for(i =0; i < 23; i++) {
        cout << setw(3) << i << setw(25) << factorial(i) << endl;
    }

    return 0;
}
unsigned long long factorial (unsigned int n){
    unsigned long long f{1};

    if (n > 1) {
       f = n * factorial(n-1);
    }
    return f;
}