using System;

public class Program

{

    public static void Main()

    {

        int numofunits;

        Console.WriteLine("How many units are there?");

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

        if (numofunits<100)

            Console.WriteLine("You have to pay £5 per unit.");

        else if (numofunits>100)

            Console.WriteLine("You have to pay £10 per unit.");

    }

}