hackerearth3 code example

Example: hackerearth3

#include <iostream>
using namespace std;

class F
{
    
};
  
class S : public F
{
    
};

template<typename X, typename Y>
class check
{
    class F { };
    static F find( ... ); 
    
    class T { F f[2]; };
    static T find( Y* );
    
public:
    enum { m = sizeof(T) == sizeof(find(static_cast<X*>(0)))};
    
};


template <class Q, class R> 
bool checkIf() {
 return check<Q, R>::m;
}


int main()
{
    
    check <class F, class S> t (F,S);
    cout << checkIf<class F, class S>() <<endl;
    return 0;
    
}