Gold Mine

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int locations = Integer.parseInt(scanner.nextLine());

        for (int i = 0; i < locations; i++) {
            double averageGold = Double.parseDouble(scanner.nextLine()),
                    gold, goldSum = 0;
            int dayDigging = Integer.parseInt(scanner.nextLine());
            for (int j = 0; j < dayDigging; j++) {
                gold = Double.parseDouble(scanner.nextLine());
                goldSum += gold;
            }

            if (goldSum / dayDigging >= averageGold) {
                System.out.printf("Good job! Average gold per day: %.2f.\n", goldSum / dayDigging);
            } else {
                System.out.printf("You need %.2f gold.\n", averageGold - (goldSum / dayDigging));
            }
        }
    }
}