using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("a=");

        var a = double.Parse(Console.ReadLine());

        Console.WriteLine("b=");

        var b = double.Parse(Console.ReadLine());

        if (a>b)

        {

            Console.WriteLine("Greatest number:" + a);

        }

        else

        {

            Console.WriteLine("Greatest number:" + b);

        }

    }

}