#include <iostream>

using namespace std;


class A {

public:

  A(std::string a);
  
  virtual ~A();
  
  virtual void anA() = 0;

  std::string m_name;
  
   template<class Archive> void serialize(Archive &ar, const unsigned int version)
   {
	   ar & m_name;
   }
};

class B :public A {

public:

   B();

   virtual ~B();
   
   virtual void anA();
   
   virtual void aB() = 0;

   template<class Archive> void serialize(Archive &ar, const unsigned int version)
   {
       ar & boost::serialization::base_object<A>(*this);
   }
};


class C : public B {

public:

   C() {};
   
   C(std::string a);

   virtual ~C();

   virtual void aB();
   
   std::string m_string; 
   
   template<class Archive> void serialize(Archive &ar, const unsigned int version);
};