#include <iostream>

#include <cstring>

using std::cin, std::cout, std::endl;

using std::memcpy;

class MyArray

{

private:

int *ptr;

int size;

public:

MyArray() : ptr(NULL), size(0){};

MyArray(const MyArray &z1)

{

size = z1.length();

ptr = new int[z1.size];

memcpy(ptr, z1.ptr, sizeof(int)*z1.size);

}

~MyArray()

{

if (ptr)

delete[] ptr;

};

int length() const { return size; };

int &operator[](int index) { return ptr[index]; };

MyArray &operator=(MyArray &z1)

{

if (z1.ptr != ptr)

{

if (ptr)

delete[] ptr;

size = z1.length();

ptr = new int[z1.size];

for (int i = 0; i < size; i++)

{

ptr[i] = z1[i];

}

}

return *this;

}

void print_array()

{

if (ptr)

{

for (int i = 0; i < size; i++)

{

cout << ptr[i] << ", ";

}

cout << endl;

}

}

static MyArray range(int num1) { return range(0, num1); }

static MyArray range(int num1, int num2)

{

MyArray ret;

ret.size = num2 - num1;

ret.ptr = new int[ret.size];

for (int i = 0; i < ret.size; i++)

{

ret.ptr[i] = i + num1;

}

return ret;

}

};

int main()

{

MyArray z1(MyArray::range(5)), z2;

z1.print_array();

z1[2] = 233;

z1.print_array();

z2 = z1;

z2[0] = 2333;

z2.print_array();

z1.print_array();

return 0;

}