using static System.Console;

class Complex {

    private int real;

    private int imaginary;

    public Complex(int i, int j) {

        real = i;

        imaginary = j;

    }

    public override bool Equals(object o) {

        return ((Complex)o).real == this.real && ((Complex)o).imaginary == this.imaginary;

    }

    public override string ToString() {

        return string.Format("{0} + {1}i", real, imaginary);

    }

    public override int GetHashCode() {

        return this.ToString().GetHashCode();

    } 

    public static bool operator == (Complex x, Complex y) {

        return x.Equals(y);

    }

    public static bool operator != (Complex x, Complex y)   {

        return !x.Equals(y);

    }

    public static Complex operator +(Complex x, Complex y) {

        return new Complex(x.real + y.real, x.imaginary + y.imaginary);

   }

}

public class Program {

    public static void Main() {

        var x = new Complex(10,20);

        WriteLine(x);

        var y = new Complex(10,20);

        WriteLine(y);

        var z = y;

        WriteLine(z);

        if (x == y) {

            WriteLine("z igual y");

        } else {

            WriteLine("x diferente y");

        }

        if (y != z) { 

            WriteLine("y diferente z"); 

        } else {

            WriteLine("y igual z");

        }

    }

}