#include<iostream>
 
using namespace std;
 
 
class shared_ptr
{
    public:
    int *pointer;
    public:
    shared_ptr()
    {
        pointer = new int;
    }
    ~shared_ptr()
    {
        delete pointer;
    }
    int operator* ();
    int* operator= (shared_ptr&);
};
 
int shared_ptr:: operator* ()
{
    return *(this->pointer);
}
 
int* shared_ptr:: operator= (shared_ptr& temp)
{
    return (temp.pointer);
}
 
int main()
{
    shared_ptr s1, s2;
    *(s1.pointer) = 10;
    int* k = (s1 = s2);
}

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