Computer Firm

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int modelCount = Integer.parseInt(scanner.nextLine()),
                model, rating, sales;
        double totalSales = 0, totalRating = 0;

        for (int i = 0; i < modelCount; i++) {
            model = Integer.parseInt(scanner.nextLine());
            rating = model % 10;
            sales = model / 10;
            totalRating += rating;
            totalSales += switch (rating) {
                case 2 -> 0;
                case 3 -> 0.5;
                case 4 -> 0.7;
                case 5 -> 0.85;
                default -> 1;
            } * sales;
        }

        System.out.printf("%.2f\n%.2f\n", totalSales, totalRating / modelCount);
    }
}