L03u17_TransportPrice

import java.util.Scanner;

/*
 * Created by todor on 18.01.2017 г..
 */
public class u17_TransportPrice {
    public static void main(String[] args) {

        Scanner scan = new Scanner(System.in);

        int travelDistance = Integer.parseInt(scan.nextLine());
        String travelTime = scan.nextLine();
        double minimumPrice;

        if (travelDistance < 20){
            minimumPrice = TaxiPrice(travelDistance, travelTime);
        }
        else if (travelDistance < 100) {
            minimumPrice = Math.min(TaxiPrice(travelDistance, travelTime), BusPrice(travelDistance));
        }
        else {
            minimumPrice = Math.min(TaxiPrice(travelDistance, travelTime), Math.min(
                                                                                    BusPrice(travelDistance),
                                                                                    TrainPrice(travelDistance)
                                                                                   )
                                    );
        }

        System.out.printf("%.2f",minimumPrice);

    }

    static double TaxiPrice (int distance, String dayOrNight) {
        double price = Double.MAX_VALUE;

        double tax = 0.7;
        double dayPricePerDistance = 0.79;
        double nightPricePerDistance = 0.90;

        if (dayOrNight.equals("day")){
            price = (distance * dayPricePerDistance) + tax;
        }
        else if (dayOrNight.equals("night")) {
            price = (distance * nightPricePerDistance) + tax;
        }

        return price;
    }

    static double BusPrice (int distance) {
                double pricePerDistance = 0.09;
        double price = pricePerDistance * distance;

        return price;
    }

    static double TrainPrice (int distance) {
        double pricePerDistance = 0.06;
        double price = pricePerDistance * (double) distance;

        return price;
    }
}