Credit System

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int n = Integer.parseInt(scanner.nextLine()),
                number;
        double totalGrades = 0, totalCredits = 0;

        for (int i = 0; i < n; i++) {
            number = Integer.parseInt(scanner.nextLine());
            int grade = number % 10;
            double credit = (int) number / 10;

            totalGrades += grade;

            if (grade == 2) {
                credit = 0;
            } else if (grade == 3) {
                credit *= 0.50;
            } else if (grade == 4) {
                credit *= 0.70;
            } else if (grade == 5) {
                credit *= 0.85;
            }

            totalCredits += credit;
        }

        System.out.printf("%.2f\n%.2f\n", totalCredits, totalGrades / n);
    }
}