#include <string> 

using namespace std; 

typedef int Item;

class OrderedListBase 
{
public:
  // Get info about list
  virtual bool IsEmpty( ) const = 0;
};

class OrderedArrayList: OrderedListBase
{
private:
	int count;
public: 
	bool IsEmpty() {
		count = 0;
	return true;
	}
};



int main ()
{
	OrderedListBase base;
	OrderedArrayList list;


	return 0;
}