using System;

public class Program

{

    public static void Main()

    {

        int num1, num2, num3;

     Console.Write("Input the 1st number :");

    num1 = Convert.ToInt32(Console.ReadLine());

    Console.Write("Input the  2nd number :");

    num2 = Convert.ToInt32(Console.ReadLine());

    Console.Write("Input the 3rd  number :");

    num3 = Convert.ToInt32(Console.ReadLine());

  if (num1 >num2 && num1>num2)

    {

      Console.Write("The 1st Number is the greatest among three.");

        }

    else if (num2 > num3)

        Console.Write("The 2nd Number is the greatest among three ");

    else

        Console.Write("The 3rd Number is the greatest among three ");

}

}

​