package com.company;

import java.util.Scanner;

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

        int dayFirstReservation = Integer.parseInt(input.nextLine());
        int monthFirstReservation = Integer.parseInt(input.nextLine());
        int dayForComing = Integer.parseInt(input.nextLine());
        int monthForComing = Integer.parseInt(input.nextLine());
        int dayForLeaving = Integer.parseInt(input.nextLine());
        int monthForLeaving = Integer.parseInt(input.nextLine());
        double sum;
        if (monthForComing == monthForLeaving) {
            if (dayForComing - dayFirstReservation == 10) {
                sum = (dayForLeaving - dayForComing) * 25;
                System.out.printf("Your stay from %d/%d to %d/%d will cost %.2f", dayForComing, monthForComing, dayForLeaving, monthForLeaving, sum);
            } else if (monthForComing - monthFirstReservation == 1) {
                sum = (dayForLeaving - dayForComing) * 25;
                double discountSum = 0.20 * sum;
                double finalSum = sum - discountSum;
                System.out.printf("Your stay from %d/%d to %d/%d will cost %.2f", dayForComing, monthForComing, dayForLeaving, monthForLeaving, finalSum);
            } else {

                sum = (dayForLeaving - dayForComing) * 30;
                System.out.printf("Your stay from %d/%d to %d/%d will cost %.2f", dayForComing, monthForComing, dayForLeaving, monthForLeaving, sum);
            }
        } else {
            System.out.println("Error");
        }

    }
}