#include <iostream>
#include <iomanip>

using namespace std;

typedef unsigned long long  BigIntT;
//typedef unsigned int  BigIntT;

BigIntT Factorial(int i);
void PrintBigIntT(BigIntT i);

int main() {

    BigIntT nFact;
    int n;

    cout << setw(4) << "n" << setw(20) << "n!" << endl;

    for(n = 0; n <= 20; n++) {
        nFact = Factorial(n);
        cout << setw(4) << n << setw(20) << nFact << endl;
    }

    return 0;
   
}

BigIntT Factorial(int n){
   BigIntT value = 1;
   int i;

   if (n > 1) {
      for (i = 2; i <= n; i++) {
          value *= i;
      }
   }

   return value;
}