import java.util.Scanner;

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

        int days = Integer.parseInt(scan.nextLine());
        String room = scan.nextLine();
        String rating = scan.nextLine();

        double sum = 0.0;

        switch (room){
            case "room for one person":
                sum = (days - 1) * 18;

                if (rating.equals("positive")){
                    sum += (sum*0.25);
                }else if (rating.equals("negative")){
                    sum -= (sum*0.10);
                }
                break;

            case "apartment":
                sum = (days - 1) * 25;

                if (days < 10){
                    sum *= 0.70;
                }else if (days <= 15){
                    sum *= 0.65;
                }else {
                    sum *= 50;
                }

                if (rating.equals("positive")){
                    sum += (sum*0.25);
                }else if (rating.equals("negative")){
                    sum -= (sum*0.10);
                }

                break;

            case "president apartment":
                sum = (days - 1) * 35;

                if (days < 10){
                    sum *= 0.90;
                }else if (days <= 15){
                    sum *= 0.85;
                }else {
                    sum *= 0.80;
                }

                if (rating.equals("positive")){
                    sum += (sum*0.25);
                }else if (rating.equals("negative")){
                    sum -= (sum*0.10);
                }
        }
        System.out.printf("%.2f", sum);
    }
}