BikeRace

using System;

namespace BikeRace
{
    class Program
    {
        static void Main(string[] args)
        {
            int numberOfJuniorCyclists = int.Parse(Console.ReadLine());
            int numberOfSeniorCyclists = int.Parse(Console.ReadLine());
            string kindOfTrack = Console.ReadLine();

            double feeJuniors = 0;
            double feeSeniors = 0;
            int sumOfCyclists = numberOfJuniorCyclists + numberOfSeniorCyclists;
            double sum = 0;

            if (kindOfTrack == "trail")
            {
                feeJuniors = 5.50;
                feeSeniors = 7.00;
                sum = (numberOfJuniorCyclists * feeJuniors) + (numberOfSeniorCyclists * feeSeniors);
            }
            else if (kindOfTrack == "cross-country")
            {
                feeJuniors = 8.00;
                feeSeniors = 9.50;
                sum = (numberOfJuniorCyclists * feeJuniors) + (numberOfSeniorCyclists * feeSeniors);
            }
            else if (kindOfTrack == "downhill")
            {
                feeJuniors = 12.25;
                feeSeniors = 13.75;
                sum = (numberOfJuniorCyclists * feeJuniors) + (numberOfSeniorCyclists * feeSeniors);
            }
            else if (kindOfTrack == "road")
            {
                feeJuniors = 20.00;
                feeSeniors = 21.50;
                sum = (numberOfJuniorCyclists * feeJuniors) + (numberOfSeniorCyclists * feeSeniors);
            }
            if (sumOfCyclists >= 50)
            {
                sum = sum - (sum * 0.25);
            }
            double totalSum = sum - (sum * 0.05);

            Console.WriteLine($"{totalSum:F2}");
        }
    }
}