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 opinion = scanner.nextLine();
        double nights = days - 1;
        double price = 0 ;
        if (room.equals("room  for  one  person")){
            price = nights * 18;
        }
        else if (room.equals("apartment")){
            price = nights * 25;
            if (nights < 10){
                price = price - (price * 0.3);
            }
                else if (nights >= 10 && nights <= 15){
                    price = price - (price * 0.35);
                }
                else if (nights > 15){
                    price = price - (price * 0.5);
            }

        }
        else if (room.equals("president apartment")){
            price = nights * 35;
            if (nights < 10){
                price = price - (price * 0.1);
            }
            else if (nights >= 10 && nights <= 15){
               price = price - (price * 0.15);
            }
            else if (nights > 15){
              price = price - (price * 0.2);
            }
        }
        if (opinion.equals("positive")){
            System.out.printf("%.2f", price + (price * 0.25));
        }
        else if (opinion.equals("negative")){
            System.out.printf("%.2f", price - (price * 0.1));
        }
    }
}