using System;

namespace Padawan_Equipment
{
    class Program
    {
        static void Main(string[] args)
        {
            double budged = double.Parse(Console.ReadLine());
            int studentsCount = int.Parse(Console.ReadLine());
            double lightsabersPrice = double.Parse(Console.ReadLine());
            double robesPrice = double.Parse(Console.ReadLine());
            double beltsPrice = double.Parse(Console.ReadLine());

            double additionalEquipment = Math.Ceiling(studentsCount * 1.1);
            double totalSabersPrice = lightsabersPrice * additionalEquipment;
            double totalRobesPrice = robesPrice * studentsCount;
            double totalBeltsPrice = beltsPrice * studentsCount;

            double totalPrice = totalSabersPrice + totalRobesPrice + totalBeltsPrice;

            for (int i = 1; i <= studentsCount; i++)
            {
                if (i % 6 == 0)
                {
                    totalPrice -= beltsPrice;
                }
            }

            if (budged >= totalPrice)
            {
                Console.WriteLine($"The money is enough - it would cost {totalPrice:F2}lv.");
            }

            else
            {
                double diff = totalPrice - budged;
                Console.WriteLine($"Ivan Cho will need {diff:F2}lv more.");
            }
        }
    }
}