using System;

namespace TrainTheTrainers

{

public class Program

  {

    public static void Main()

    {

    int trainers = int.Parse(Console.ReadLine());

            double allScore = 0;

            double counter = 0;

            while (true)

            {

                string nameOfPresentation = Console.ReadLine();

                double sumOfGrades = 0;

​

                if (nameOfPresentation == "Finish")

                {

                    double scoreSum = allScore / counter;

                    Console.WriteLine("Student's final assessment is {0:f2}.", scoreSum);

                    break;

                }

                for (int i = 0; i < trainers; i++)

                {

                    double grade = double.Parse(Console.ReadLine());

                    sumOfGrades += grade;

                    allScore += grade;

                    counter++;

                }

                double sumAfter = sumOfGrades / trainers;

                Console.WriteLine("{0} - {1:f2}.", nameOfPresentation, sumAfter);

            }

    }

  }

}