using System;

​

public class Program

{

    public static void Main()

    {

        var days = int.Parse(Console.ReadLine());

        var allDancers = int.Parse(Console.ReadLine());

        var loss = 0.0;

        var all = 100 * days * allDancers;

        for(int i=1; i <= days; i++)

        {

            var h = int.Parse(Console.ReadLine());

            if(i % 2 == 0 && h % 2 ==0)

            {

                loss+= (allDancers * 68);

            }

            if(i % 2 != 0 && h % 2 ==0)

            {

                loss+= (allDancers * 49);

            }

            if(i % 2 == 0 && h % 2 !=0)

            {

                loss+= (allDancers * 65);

            }

            if(i % 2 != 0 && h % 2 !=0)

            {

                loss+= (allDancers * 30);

            }

        }

        var a = all - loss;

        //all-=loss;

        var per = a / days / allDancers;

        if(per < 50 )

        {

            Console.WriteLine("They are wasted! Energy left: {0:f2}", per);         

        }

        else

        {           

            Console.WriteLine("They feel good! Energy left: {0:f2}", per);

        }       

    }

}