02. Bike Race

import java.util.Scanner;

public class BikeRace {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int juniorCount = Integer.parseInt(scanner.nextLine());
        int seniorCount = Integer.parseInt(scanner.nextLine());
        String trace = scanner.nextLine();

        double juniorPrice = 0, seniorPrice = 0;

        switch (trace) {
            case "trail" -> {
                juniorPrice = 5.50;
                seniorPrice = 7.00;
            }
            case "cross-country" -> {
                juniorPrice = 8.00;
                seniorPrice = 9.50;
            }
            case "downhill" -> {
                juniorPrice = 12.25;
                seniorPrice = 13.75;
            }
            case "road" -> {
                juniorPrice = 20.00;
                seniorPrice = 21.50;
            }
        }

        double sum = juniorPrice * juniorCount + seniorPrice * seniorCount;

        if (trace.equals("cross-country") && juniorCount + seniorCount >= 50) {
            sum *= 0.75;
        }

        System.out.printf("%.2f\n", sum * 0.95);
    }
}