using System;

namespace Reservation
{
    class Program
    {
        static void Main(string[] args)
        {
            int reservationDay = int.Parse(Console.ReadLine());
            int reservationMonth = int.Parse(Console.ReadLine());
            int accommodationDay = int.Parse(Console.ReadLine());
            int accommodationMonth = int.Parse(Console.ReadLine());
            int leaveDay = int.Parse(Console.ReadLine());
            int leaveMonth = int.Parse(Console.ReadLine());

            double roomPriceWithoutDiscount = 30;
            double roomPriceTenDayBefore = 25;
            double roomPricePreviousMonth = 25 - (0.20 * 25);

            double nights = accommodationDay - leaveDay;
            double cost = 0;
            if (reservationMonth < accommodationMonth && reservationDay < accommodationDay)
            {
                cost = nights * roomPricePreviousMonth;
            }
            else if (reservationMonth == accommodationMonth && reservationDay < (accommodationDay - 10))
            {
                cost = nights * roomPriceTenDayBefore;
            }
            else
            {
                cost = nights * roomPriceWithoutDiscount;
            }

            cost = Math.Abs(cost);

            Console.WriteLine($"Your stay from {accommodationDay}/{accommodationMonth} to {leaveDay}/{leaveMonth} will cost {cost:f2}");
        }
    }
}