5-5

#include <iostream>
using namespace std;
class A
{
public:
	void f1();
	int i;
protected:
	void f2();
	int j;
private:
	int k;
};
class B:public A
{
public:
	void f3();
protected:
	int m;
private:
	int n;
};
class C:public B 
{
public:
	void f4();
private:
	int p;
};
int main()
{
 A a1;
 B b1;
 C c1;
 return 0;
}