#include <iostream>

int main(){
 unsigned long long N;
 std::cin >> N;
 unsigned long long A = 1;
 if(A >= 9765625) std::cout << "000000000000" << std::endl;
 else{
  for(unsigned long long i = 2; i <= N; i++) A *= i, A %= 1000000000000;
  std::cout << A << std::endl;
 }
}