#include <iostream>
using namespace std;
class cls
{    int *v,nr;
public:cls(int i=0):nr(i),v(new int[i]){for(int j=0;j<nr;j++){v[j]=3*j;} };
       ~cls(){delete[] v;};
       int size(){ return  nr;};
       int &operator[](int i){return v[i];};
       cls operator+(cls y){
                            cls x(size());
                            for(int i=0;i<size();i++){x[i]=v[i]+y[i];}
                            return x;}
};

int main()
{   cls x(10),y=x,z;
    x[3]=y[6]=-15;
    z=x+y;
    for(int i=0;i<x.size();i++){        cout<<z[i]<<' ';}
    return 0;
}