// Program to replaces two numbers without using using a third variable.

using System;

​

class GFG {

    public static void Main()

    {

        int x = 10;

        int y = 5;

​

        x = x + y;

        y = x - y;

        x = x - y;

        Console.WriteLine("After swapping: x = " + x

                        + ", y = " + y);

    }

}

​