#include <iostream>
using namespace std;
class A
{
int x;
public:
A(int i):x(i){}
int get_x() const { return x; }
};
class B : public A
{
int *y;
public:
B(int i) :A(i)
{
y = new int[i];
for (int j = 0; j < i; j++) y[j] = 1;
}
B(B&);
int &operator[](int i) { return y[i]; }
};
B::B(B& a)
{
y = new int[a.get_x()];
for (int i = 0; i < a.get_x(); i++) y[i] = a[i];
}
ostream &operator<<(ostream& o, B a)
{
for (int i = 0; i < a.get_x(); i++)o << a[i];
return o;
}
int main()
{
B b(5);
cout << b;
return 0;
}