import java.util.Scanner;

public class SkiBreak {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        //1. крайна цена = броя нощувки * цена за нощувка
        //бр нощувки =дни - 1
        //цена за 1 нощувка-> зависи от типа на стаята
        //2.намалението
        //3.оценка
        int days = Integer.parseInt(scanner.nextLine());
        String roomType = scanner.nextLine();
        String grade = scanner.nextLine(); //positive or negative
        int nights = days -1; //нощувки
        //проверка за стаята
        double pricePerNight = 0;
        switch (roomType) {
            case "room for one person":
                pricePerNight = 18;
                break;
            case"apartment":
                pricePerNight = 25;
                break;
            case "president apartment":
                pricePerNight = 35;
                break;
        }
        double totalPrice = nights * pricePerNight;
        if (roomType.equals("apartment")) {
            if (days<10){
                //-30%
                totalPrice = totalPrice * 0.7;
            } else if (days >= 10 && days <= 15){
                //-35%
                totalPrice = totalPrice * 0.65;
            } else if (days > 15) {
                totalPrice = totalPrice * 0.5 *totalPrice;
            }
        }else if (roomType.equals("president apartment")) {
            if (days<10){
                //-10%
                totalPrice = totalPrice * 0.9;
            } else if (days >= 10 &&  days <= 15){
                //-15%
                totalPrice = totalPrice * 0.85;
            } else if (days > 15) {
                totalPrice = totalPrice * 0.8;
            }

        }
        if (grade.equals("positive")) {
            totalPrice *=1.25;

        }else if (grade.equals("negative")) {
            totalPrice = totalPrice * 0.9;
        }
        System.out.printf("%.2f", totalPrice);

    }
}