#include <iostream>
using namespace std;

template <int N>
class Factorial {
  public:
    int operator() () {
      Factorial<N-1> f;
      return N * f();
    }
};

template <>
class Factorial<1> {
  public:
    int operator() () {
      return 1;
    }
};

int main() {
  Factorial<10> f;
  cout << f() << endl;
}