using System;

class TheBiggestOfFiveNumbers
{
    static void Main()
    {
        Console.Write("Enter first number: ");
        double a = double.Parse(Console.ReadLine());
        Console.Write("Enter second number: ");
        double b = double.Parse(Console.ReadLine());
        Console.Write("Enter third number: ");
        double c = double.Parse(Console.ReadLine());
        Console.Write("Enter fourth number: ");
        double d = double.Parse(Console.ReadLine());
        Console.Write("Enter fifth number: ");
        double e = double.Parse(Console.ReadLine());

        double biggestNumber = a;

        if (b > biggestNumber)
        {
            biggestNumber = b;
        }

        if (c > biggestNumber)
        {
            biggestNumber = c;
        }
        if (d > biggestNumber)
        {
            biggestNumber = d;
        }
        if (e > biggestNumber)
        {
            biggestNumber = e;
        }

        Console.WriteLine("The biggest number is: {0}", biggestNumber);
    }
}