BelowAndAboveAverage

import java.util.Scanner;

public class belowAndAboveAverage {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String[] input = sc.nextLine().split(",");
        int[] a = new int[input.length];
        for (int i = 0; i < a.length; i++) {
            a[i] = Integer.parseInt(input[i]);
        }
        int size = a.length;
        double sum = 0;
        for (int i = 0; i < a.length; i++) {
            sum += a[i];
        }
        double avg = sum / size;
        String[] numAsString = new String[a.length];
        System.out.printf("avg: %.2f", avg);
        System.out.println();
        System.out.print("below: ");
        int countBelow = 0;
        for (int i = 0; i < size; i++) {
            if (a[i] < avg) {
                countBelow += 1;
            }
        }
        int[] belowNumbers = new int[countBelow];
        int idx = 0;
        for (int i = 0; i < a.length; i++) {
            if (a[i] < avg) {
                belowNumbers[idx] = a[i];
                idx += 1;
            }
        }
        String[] numbersBelowAsString = new String[belowNumbers.length];
        for (int i = 0; i < belowNumbers.length; i++) {
            numbersBelowAsString[i] = Integer.toString(belowNumbers[i]);
        }
        System.out.println(String.join(",", numbersBelowAsString));
        System.out.print("above: ");
        int countAbove = 0;
        for (int i = 0; i < size; i++) {
            if (a[i] > avg) {
                countAbove += 1;
            }
        }
        int[] aboveNumbers = new int[countAbove];
        int index = 0;
        for (int i = 0; i < a.length; i++) {
            if (a[i] > avg) {
                aboveNumbers[index] = a[i];
                index += 1;
            }
        }
        String[] numbersAsString = new String[aboveNumbers.length];
        for (int i = 0; i < aboveNumbers.length; i++) {
            numbersAsString[i] = Integer.toString(aboveNumbers[i]);
        }
        System.out.println(String.join(",", numbersAsString));
    }
}