using System;

public class Program

{

    public static void Main()

    {

         int a, b; 

        Console.WriteLine("enter a no:a=");

        a=int.Parse(Console.ReadLine());

        Console.WriteLine("enter b no:b=");

        b=int.Parse(Console.ReadLine());

        {

            a=a+b;

            b=a-b;

            a=a-b;

        }

        Console.WriteLine("a="+a);

        Console.WriteLine("b="+b);

    }

}