#include <iostream>  
using namespace std; 
 
class A { 
public: 
    int a; 
    int getB() { 
        return B::b; 
    } 
    class B { 
        public: 
            B() { 
                b = 1; 
            } 
            int b; 
    }; 
}; 
 
int main()  
{ 
    A a; 
    cout << a.getB(); 
    return 0; 
}