13

import java.util.Scanner;

public class SkiTrip_10 {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int days = Integer.parseInt(scan.nextLine());
        int nights = days - 1;
        String room = scan.nextLine();
        String review = scan.nextLine();
        int price = 0;
        double discount = 0;

        switch (room) {
            case "room for one person":
                price = 18;
                break;
            case "apartment":
                price = 25;
                break;
            case "president apartment":
                price = 35;
                break;
        }

        if (nights < 10) {
            if (room.equals("apartment")) {
                discount = 0.3;
            } else if (room.equals("president apartment")) {
                discount = 0.1;
            }
        } else if (nights >= 10 && nights <= 15) {
            if (room.equals("apartment")) {
                discount = 0.35;
            } else if (room.equals("president apartment")) {
                discount = 0.15;
            }
        } else if (nights > 15) {
            if (room.equals("apartment")) {
                discount = 0.5;
            } else if (room.equals("president apartment")) {
                discount = 0.2;
            }
        }

        double totalPrice = nights * price;
        double endPrice = totalPrice * (1 - discount);

        if (review.equals("positive")) {
            endPrice *= 1.25;
        } else {
            endPrice *= 0.9;
        }

        System.out.printf("%.2f", endPrice);
    }
}