#include <iostream>

using namespace std;
class plurality
{
private:
    double a,b;
public:
    plurality(){}
    plurality(double x,double y)
    {
        a=x;
        b=y;
    }
    ~plurality()
    {

    }
    plurality operator+(plurality A)
    {
        return plurality(a+A.a,b+A.b);
    }
    plurality operator-(plurality A)
    {
        return plurality(a-A.a,b-A.b);
    }
    plurality operator*(plurality A)
    {
        return plurality(a*A.a-b*A.b,b*A.a+a*A.b);
    }
    plurality operator/(plurality A)
    {
        return plurality((a*A.a+b*A.b)/(A.a*A.a+A.b*A.b),(b*A.a-a*A.b)/(A.a*A.a+A.b*A.b));
    }
    void show()
    {
        if(b<0)
        {
            cout<<a<<b<<"i"<<endl;
        }
        if(b==0)
        {
            cout<<a<<endl;
        }
        if(b>0)
        {
            cout<<a<<"+"<<b<<"i"<<endl;
        }
    }

};


int main()
{
    plurality A(2,3);
    plurality B(-1,3);
    plurality C;
    C=A+B;
    C.show();
    C=A-B;
    C.show();
    C=A*B;
    C.show();
    C=A+B;
    C.show();

}