#include <iostream>

using namespace std;
class Complex {
    private: int real,imag,three,four;
    public: Complex(int r=0, int i=0) {
        real = r;
        imag = i;
    }
    Complex operator + (Complex obj) {
        Complex res;
        res.real = real + obj.real;
        res.imag = imag + obj.imag;
        return res;
    }
    Complex operator - (Complex obj) {
        Complex res;
        res.real = real - obj.real;
        res.imag = imag - obj.imag;
        return res;
    }
    Complex operator * (Complex obj) {
        Complex res;
        res.real = real * obj.real;
        res.three = real * obj.imag;
        res.four = imag * obj.real;
        res.imag = imag * obj.imag;
        return res;
    }
    void printAdd() {
        cout << real << " + i" << imag << endl;
    }
    void printSub() {
        cout << real << " - i" << imag << endl;
    }
    void printMul() {
        cout << real << " + i" << three << " + " << four << " + i" << imag << endl;
    }
};

int main() {
    Complex c1 = Complex(10, 5);
    Complex c2 = Complex(2, 3);
    Complex add = c1 + c2;
    Complex sub = c1 - c2;
    Complex mul = c1 * c2;
    add.printAdd();
    sub.printSub();
    mul.printMul();
    return 0;
}