SkiTrip

import javax.swing.*;
import java.util.Scanner;

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

        int days = Integer.parseInt(scanner.nextLine());
        String room = scanner.nextLine();
        String grade = scanner.nextLine();

        int nights = days - 1;
        double price = 0;
        if ("room for one person".equals(room)) {
            price = nights * 18;
        }
        else if ("apartment".equals(room)) {
            if (nights < 10) {
                price = (nights * 25 * 0.7);
            }
            if (nights >= 10 && days <= 15) {
                price = (nights * 25 * 0.65);
            }
            if (nights > 15) {
                price = (nights * 25 * 0.5);
            }
        } else if ("president apartment".equals(room)) {
            if (nights < 10) {
                price = (nights * 35 * 0.10);
            }
            if (nights >= 10 && days <= 15) {
                price = (nights * 35 * 0.85);
            }
            if (nights > 15) {
                price = (nights * 35 * 0.8);
            }
        }
        if ("positive".equals(grade)) {
            System.out.printf("%.2f", price *1.25);
        } else if ("negative".equals(grade)) {
            System.out.printf("%.2f", price * 0.9);
        }


    }
}