kurec

import java.io.PrintStream;
import java.util.Scanner;

public class asdfghg {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int jury = Integer.parseInt(scanner.nextLine());
        String presentation = scanner.nextLine();
        double sumForAll = 0;
        int counter = 0;
        while (!presentation.equals("Finish")) {
            double sumGrades = 0;
            for (int i = 0; i < jury; i++) {
                double grade = Double.parseDouble(scanner.nextLine());
                counter++;
                sumGrades += grade;
                sumForAll += grade;
            }
            double average = sumGrades / jury;
            System.out.printf("%s - ", presentation);
            System.out.printf("%.2f.\n", average);
            presentation = scanner.nextLine();
        }
        double averageAll = sumForAll / counter;
        System.out.printf("Student's final assessment is %.2f.\n", averageAll);
    }
}