using System;

public class Program

{

    public static void Main()

    {

        //Reverse an integer without converting it to a string.

   //Input: 789

   //Output: 987

   //Input: -411

   //Output: -114

        int input = 789;

        int result = 0;

        789%10  = 78

            78%10 = 7

        Console.WriteLine("Hello World");

    }

}