TrainTheTrainers

import java.util.Scanner;

public class TrainTheTrainers {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        // read count of graders
        int juryCount = Integer.parseInt(scanner.nextLine());

        // save grades total count and total sum
        double allGradesSum = 0.0;
        int allGradesCount = 0;

        String command = scanner.nextLine();
        while(!command.equals("Finish")) {
            String presentationName = command;

            // save grades only for current presentation
            double gradeSumCurrentPres = 0.0;
            for (int i = 1; i <= juryCount; i++) {
                // read grade
                double grade = Double.parseDouble(scanner.nextLine());
                // increment the count of all grades
                allGradesCount++;
                // add grade to the total sum of grades
                allGradesSum = allGradesSum + grade;
                // add grade to current average grade sum
                gradeSumCurrentPres = gradeSumCurrentPres + grade;
            }

            // print average grade for the current presentation
            System.out.printf("%s - %.2f.%n", presentationName, gradeSumCurrentPres/juryCount);
            command = scanner.nextLine();
        }

        // print final average
        System.out.printf("Student's final assessment is %.2f.", allGradesSum/allGradesCount);
    }
}