using System;

namespace _02.Reservation
{
    class Reservation
    {
        static void Main(string[] args)
        {
            int dayNow = int.Parse(Console.ReadLine());
            int monthNow = int.Parse(Console.ReadLine());

            int checkInDay = int.Parse(Console.ReadLine());
            int checkInMonth = int.Parse(Console.ReadLine());

            int checkOutDay = int.Parse(Console.ReadLine());
            int checkOutMonth = int.Parse(Console.ReadLine());

            int nights = checkOutDay - checkInDay;
            int daysApart = Math.Abs(dayNow - checkInDay);
            int monthsApart = Math.Abs(monthNow - checkInMonth);

            bool earlyBooking10days = false;
            bool earlyBooking1month = false;

            double price = 30;

            if (daysApart >= 10)
            {
                earlyBooking10days = true;
            }

            if (monthsApart >= 1)
            {
                earlyBooking1month = true;
                earlyBooking10days = true;
            }

            double cost = nights * price;

            if (earlyBooking10days)
            {
                cost = nights * 25;
            }

            if (earlyBooking1month)
            {
                cost = cost * 0.8;
            }

            Console.WriteLine($"Your stay from {checkInDay}/{checkInMonth} to {checkOutDay}/{checkOutMonth} will cost {cost:F2}");

        }
    }
}