SkiTrip

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 rooms = scanner.nextLine();
        String grade = scanner.nextLine();
        double nights = days - 1;
        double price = 0;

        switch (rooms){
            case "room for one person":
                price = nights * 18.00;
                break;
            case "apartment":
                price = nights * 25.00;
                if (price < 10){
                    price *= 0.7;

                }else if (price <= 15){
                    price *= 0.65;

                }else if (price > 15){
                    price *= 0.5;

                }
                break;
            case "president apartment":
                price = nights * 35.00;
                if (days < 10){
                    price *= 0.9;

                }else if (days <= 15){
                    price *= 0.85;

                }else if (days > 15){
                    price *= 0.8;

                }
                break;
        }
        if ("positive".equalsIgnoreCase(grade)){
            price = price + (price * 0.25);
        }else {
            price = price - (price * 0.1);
        }
        System.out.println(String.format("%.2f", price));
    }
}