import java.util.Scanner;

public class SkiTrip {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int day = Integer.parseInt(scan.nextLine());
        String room = scan.nextLine();
        String evaluation = scan.nextLine();
        double price = 0;
        double days = day - 1;
        switch (room) {
            case "room for one person":
                price = days * 18;
                break;
            case "apartment":
                price = days * 25;
                if (days < 10) {
                    price = price * 0.7;
                } else if (days >= 10 && days <= 15) {
                    price = price * 0.65;
                } else if (price > 15) {
                    price = price * 0.5;
                }
                break;
            case "president apartment":
                price = days * 35;
                if (days < 10) {
                    price = price * 0.9;
                } else if (days >= 10 && days <= 15) {
                    price = price * 0.85;
                } else if (price > 15) {
                    price = price * 0.8;
                }
                break;
                }
        switch (evaluation) {
            case "positive":
                price = price * 1.25;
                break;
            case "negative":
                price = price * 0.9;
        }
        System.out.printf("%.2f", price);
    }
}