#include <iostream>
using namespace std;

class Complex {
private:
  int r, i;

public:
  Complex() = default;
  Complex(int);
  Complex(int, int);
  Complex operator+(Complex);
  void display();
};

Complex::Complex(int a) { this->r = this->i = a; }

Complex::Complex(int r, int i) {
  this->r = r;
  this->i = i;
}

Complex Complex::operator+(Complex op) {
  return Complex(this->r + op.r, this->i + op.i);
}

void Complex::display() {
  if (this->r)
    cout << this->r;

  if (this-> r && this->i > 0)
    cout << '+';

  if (this->i)
    cout << this->i << 'i';

  cout << endl;
}

int main() {
  Complex c;
  Complex a(4), b(34, -2124);
  c = a + b;
  c.display();
}