#include <iostream>
using namespace std;
class B {
int x;
public:
B(int i = 2)
: x(i)
{
}
int get_x() const { return x; }
};
class D : public B {
int* y;
public:
D(int i = 2)
: B(i)
{
y = new int[i];
for (int j = 0; j < i; j++)
y[j] = 1;
}
D(D& a)
{
y = new int[a.get_x()];
for (int i = 0; i < a.get_x(); i++)
y[i] = a[i];
}
int& operator[](int i) { return y[i]; }
};
ostream& operator<<(ostream& o, const D& a)
{
for (int i = 0; i < a.get_x(); i++)
o << a[i];
return o;
}
int main()
{
D ob(5);
cout << ob;
return 0;
}