BikeRace

using System;

namespace BikeRace
{
    class BikeRace
    {
        static void Main(string[] args)
        {
            int NumbersOfjuniors = int.Parse(Console.ReadLine());
            int NumbersOfSeniors = int.Parse(Console.ReadLine());
            string layout = Console.ReadLine().ToLower();
            double fee = 0;
            double donatedАmount = 0;
            if (layout == "cross-country")
            {
                if (NumbersOfjuniors + NumbersOfSeniors < 50)
                {
                    fee = NumbersOfjuniors * 8 + NumbersOfSeniors * 9.5;
                    donatedАmount = fee * 0.95;
                }
                else
                {
                    fee = (NumbersOfjuniors * 8 + NumbersOfSeniors * 9.5) * 0.75;
                    donatedАmount = fee * 0.95;
                }
            }
            else if (layout == "trail")
            {
                fee = NumbersOfjuniors * 5.5 + NumbersOfSeniors * 7;
                donatedАmount = fee * 0.95;
            }
            else if (layout == "downhill")
            {
                fee = NumbersOfjuniors * 12.25 + NumbersOfSeniors * 13.75;
                donatedАmount = fee * 0.95;
            }
            else if (layout == "road")
            {
                fee = NumbersOfjuniors * 20 + NumbersOfSeniors * 21.5;
                donatedАmount = fee * 0.95;
            }
            Console.WriteLine($"{donatedАmount:f2}");
        }
    }
}