#include <iostream>

template<class T>struct Counter {
  Counter() {  ++count;    }
  static int count;
};

template<class T> int Counter<T>::count = 0;

struct Derived1: Counter<Derived1>  {};

struct Derived2: Counter<Derived2>  {};

int main(int argc, char** argv)
{
  Derived1 a, b;
  Derived2 c;
  std::cout << Derived1::count << Derived2::count << '\n';
  return 0;
}