06.Gold-mine

using System;

namespace _06.GoldDigging
{
    class Program
    {
        static void Main(string[] args)
        {
            int numLocations = int.Parse(Console.ReadLine());

            for (int i = 1; i <= numLocations; i++)
            {
                double goldExpected = double.Parse(Console.ReadLine());
                double diggingDays = double.Parse(Console.ReadLine());
                double goldperDay = 0;

                for (int j = 1; j <= diggingDays; j++)
                {
                    goldperDay += double.Parse(Console.ReadLine());
                }

                goldperDay /= diggingDays;
                if (goldperDay >= goldExpected)
                {
                    Console.WriteLine($"Good job! Average gold per day: {goldperDay:F2}.");
                }
                else
                {
                    Console.WriteLine($"You need {goldExpected - goldperDay:f2} gold.");
                }
            }
        }
    }
}