using System;

public class Program

{

    public static void Main()

    {

    int number;

    int numbertwo;

    int numberthree;

        Console.WriteLine("Give me a number please");

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

        Console.WriteLine("Give me another number please");

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

        Console.WriteLine("Give me another number please");

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

        if( number == numbertwo || number ==  numberthree || numberthree == numbertwo  )

        {

        Console.WriteLine("The numbers must be different, try again");

        }

        else if ( number > numbertwo && number > numberthree )

        {

        Console.WriteLine("The highest number is " + number );

        }

        else if ( numbertwo > number && numbertwo > numberthree )

        {

        Console.WriteLine("The highest number is " + numbertwo );

        }

        else if ( numberthree > number && numberthree > number )

        {

        Console.WriteLine("The highest number is " + numberthree );

        }

    }

}