import java.util.Scanner;

public class exam3 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        double teg = Double.parseDouble(scanner.nextLine());
        String tip = scanner.nextLine();
        double distance = Double.parseDouble(scanner.nextLine());

        double price = 0;
        double sum = 0;
        double percent = 0;

        if (teg >= 1 && teg <= 10) {
            price = 0.05;

            if (tip.equals("express")) {
                percent = (price * 0.40);
            }

        } else if (teg > 11 && teg <= 40) {
            price = 0.10;

            if (tip.equals("express")) {
                percent = (price * 0.05);

            }

        } else if (teg > 41 && teg <= 90) {
            price = 0.15;

            if (tip.equals("express")) {
                percent = (price * 0.02);

            }
        } else if (teg > 91 && teg <= 150) {
            price = 0.20;
            if (tip.equals("express")) {
                percent = (price * 0.01);

            }

        } else if (teg < 1) {
            price = 0.03;
            if (tip.equals("express")) {
                percent = (price * 0.80);

            }


        }
        sum = price * distance;
        double res = teg * percent;
        double result = res * distance;
        double total = result + sum;

        System.out.printf("The delivery of your shipment with weight of %.3f kg. would cost %.2f lv.", teg, total);

    }
}