using System;

public class Program

{

    public static void Main()

    {

        //Input//

        Console.WriteLine("Enter amount of jr. Biclysts");

        var JB = Double.Parse(Console.ReadLine());

        Console.WriteLine("Enter amount of Biclysts");

        var B = Double.Parse(Console.ReadLine());

        Console.WriteLine("Enter type of trail");

        var TT = Console.ReadLine();

        var ALL = JB + B;

        //logistics//

        if (TT == "trail")

        {

            var Price = JB * 5.5 + B * 7;

            var P2 = Price - 0.05 * Price;

            Console.WriteLine(P2 + " BGN");

        }

        if (TT == "cross-country")

        {

            if (ALL >= 50)

            {

                var D = JB * 8 + B * 9.5 - (JB * 8 + B * 9.5) * 0.25;

                var D2 = D - D * 0.05;

                var D3 = Math.Round(D2,2);

                Console.WriteLine(D3 + " BGN");

            }

            else

            {

            var Price1 = JB * 8 + B * 9.5;

            var P21 = Price1 - 0.05 * Price1;

            Console.WriteLine(P21 + " BGN");

            }

        }

             if (TT == "downhill")

        {

            var Price2 = JB * 12.25 + B * 13.75;

            var P22 = Price2 - 0.05 * Price2;

            Console.WriteLine(P22 + " BGN");

        }

             if (TT == "hill")

        {

            var Price3 = JB * 20 + B * 21.5;

            var P23 = Price3 - 0.05 * Price3;

            Console.WriteLine(P23 + " BGN");

             }

    }

}