edited

import java.util.Scanner;

public class SkiTrip {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);

        int days = Integer.parseInt(scan.nextLine()) - 1;
        String room = scan.nextLine();
        String rating = scan.nextLine();

        double sum = 0.0;

        switch (room) {
            case "room for one person":
                sum = days * 18;

                break;

            case "apartment":
                sum = days * 25;

                if (days > 15) {
                    sum *= 0.50;
                } else if (days >= 10) {
                    sum *= 0.65;
                } else {
                    sum *= 70;
                }

                break;

            case "president apartment":
                sum = days * 35;

                if (days > 15) {
                    sum *= 0.80;
                } else if (days >= 10) {
                    sum *= 0.85;
                } else {
                    sum *= 0.90;
                }

                break;
        }
        if (rating.equals("positive")) {
            sum += (sum * 0.25);
        } else if (rating.equals("negative")) {
            sum -= (sum * 0.10);
        }
        System.out.printf("%.2f", sum);
    }
}