using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Energy_Loss
{
    class Program
    {
        static void Main(string[] args)
        {
            double days = int.Parse(Console.ReadLine());
            double dancers = int.Parse(Console.ReadLine());
            var energy = 100;
            var energyUsed = 0.00;
            var energyUsed2 = 0.00;
            var energyUsed3 = 0.00;
            var energyUsed4 = 0.00;
            var totalEnergy = energy * days * dancers;

            for (int i = 1; i <= days; i++)
            {
                double hours = int.Parse(Console.ReadLine());

                if (i % 2 == 0 && hours % 2 == 0)
                {
                    energyUsed += 68.00*dancers;
                }
                else if (i % 2 == 1 && hours % 2 == 0)
                {
                    energyUsed2 += 49.00*dancers;
                }
                else if (i % 2 == 0 && hours % 2 == 1)
                {
                    energyUsed3 += 65.00*dancers;
                }
                else
                {
                    energyUsed4 += 30.00*dancers;
                }

            }
            var notUsed = totalEnergy - (energyUsed + energyUsed2 + energyUsed3 + energyUsed4);
            var eventually = notUsed / dancers / days;
            var middleUse = (energyUsed + energyUsed2 + energyUsed3 + energyUsed4) / 10 / 4;


            if (middleUse <= 50)
            {
                Console.WriteLine($"They feel good! Energy left: {eventually:f2}");
            }
            else
            {
                Console.WriteLine($"They are wasted! Energy left: {eventually:f2}");
            }
        }
    }
}