using System;

public class Program

{

    public static void Main()

    {

        int c1=0,c2=0;

        int[] a = new int[] {5,-8,7,9,-3,20,-10,15};

        int[] b = new int[a.Length];

        for (int i=0 ; i<a.Length ; i++)

        {

             if(a[i]<0)

             {

                 b[c1]=a[i];

                 c1++;

             }

        }

        c2=c1;

        for(int n=0; n<a.Length ; n++)

        {

            if(a[n]>0)

            {

                b[c2]=a[n];

                c2++;

            }

        }

        PrintArray(a);

        PrintArray(b);

    }

    public static void PrintArray(int[] arr)

    {

            for (int i=0; i<arr.Length; i++)

            {

                Console.Write(arr[i] + " ");

            }

        Console.WriteLine();

    }

}