#include<iostream>

using namespace std;

enum class Int: unsigned char { Zero=0, One, Two, Five=5};

template<int N>
int frac(){
        return N*frac<N-1>();
}

template<>
int frac<1>(){
        return static_cast<int>(Int::One);
}

int main(){
        cout << frac<3>() <<endl;
}