import java.util.Random;

public class Dzh {
    public static void main(String[] args) {
        int n = 10;
        int k = 1000;
        int[] a = input_random_Array(n, k);

        long Time = System.nanoTime();
        a = counting_sort(a, k);
        long EndTime = System.nanoTime();
        Time = Math.abs(EndTime - Time);

        for (int i = 0; i < n; i++) {
            System.out.println(a[i]);
        }

        System.out.println(Time);
    }

    static int[] input_random_Array(int n, int k) {
        int[] a = new int[n]; // n-size of array, k-maximum random number
        Random rn = new Random();

        // fill array with random numbers
        for (int i = 0; i < n; i++) {
            a[i] = rn.nextInt(k); // [0;k)
        }

        return a;
    }

    static int[] counting_sort(int[] a, int k) {
        int[] c = new int[k];
        for (int j = 0; j < a.length; j++) {
            c[a[j]]++;
        }

        int ind = 0;
        for (int i = 0; i < c.length; i++) {
            for (int j = 0; j < c[i]; j++) {
                a[ind++] = i;
            }
        }

        return a;

    }
}