TravelPrice

import java.util.Scanner;

/**
 * Created by georgi on 19.1.2017 г..
 */
public class TransportPrice {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        double n = Double.parseDouble(scanner.nextLine());
        String dayTime = scanner.nextLine();
        double taxi = 0;
        double bus = 0;
        double train = 0;

        if (n < 20) {
            double startPrice = 0.7;
            double dayPrice = 0.79;
            double nightPrice = 0.9;
            if (dayTime.equals("day")){
                taxi = startPrice + (dayPrice * n);
                System.out.println(taxi);
            } else if (dayTime.equals("night")){
                taxi = startPrice + (nightPrice * n);
                System.out.println(taxi);
            }
        } else if (n > 20 && n < 100) {
            double priceBus = 0.09;
            bus = priceBus * n;
            System.out.println(bus);
        } else if (n > 100) {
            double priceTrain = 0.06;
            bus = priceTrain * n;
            System.out.println(bus);
        }
    }
}