import java.util.Scanner;

public class Zadacha7 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

           int participants = Integer.parseInt(scanner.nextLine());
           String namePresent = scanner.nextLine();
           double totalGrade = 0;
           double counterPresentation = 0;

           while (!"Finish".equals(namePresent)){
               double gradeFor1 =0;
               for (int nachalo = 0 ; nachalo<participants; nachalo++){
                   double grade = Double.parseDouble(scanner.nextLine());
                   gradeFor1 +=grade;
               }
               counterPresentation++;
               gradeFor1 = gradeFor1/participants;
               totalGrade +=gradeFor1;
               System.out.println();
               System.out.printf("%s - %.2f." , namePresent , gradeFor1 );
               namePresent = scanner.nextLine();
           }
        System.out.println();
           totalGrade /= counterPresentation;
        System.out.printf("Student's final assessment is %.2f."  , totalGrade);
    }
}