import java.util.Scanner;

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

        int count_negative_numbers = 0;
        double sum_negative_numbers = 0;

        int count_positive_numbers = 0;
        double sum_positive_numbers = 0;

        for(int i = 0; i < 20; i++) {
            System.out.print("Number: ");
            double number = scanner.nextDouble();

            if(number < 0) {
                count_negative_numbers++;
                sum_negative_numbers += number;
            } else {
                count_positive_numbers++;
                sum_positive_numbers += number;
            }
        }

        System.out.print("Average of negative numbers: " + (sum_negative_numbers / count_negative_numbers) + "\n");
        System.out.print("Average of positive numbers: " + (sum_positive_numbers / count_positive_numbers) + "\n");
    }
}