06.

using System;

namespace softuni_basicExam
{
    class Program
    {
        static void Main(string[] args)
        {
            int locations = int.Parse(Console.ReadLine());

            double averageGoldSum = 0;

            for (int i = 1; i <= locations; i++)
            {
                double averageGoldPerDayd = double.Parse(Console.ReadLine());
                int mineDays = int.Parse(Console.ReadLine());

                for (int k = 1; k <=mineDays; k++)
                {
                    double gold = double.Parse(Console.ReadLine());
                    averageGoldSum += gold;
                }

                averageGoldSum /= mineDays;

                if (averageGoldSum >= averageGoldPerDayd)
                {
                    Console.WriteLine($"Good job! Average gold per day: {averageGoldSum:f2}.");
                }
                else
                {
                    Console.WriteLine($"You need {averageGoldPerDayd - averageGoldSum:f2} gold.");
                }
                averageGoldSum = 0;
            }
        }
    }
}