using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public static void Main()

    {

        int[] arr = {-1,1,2,0,3,-5};

        List<int> negative = new List<int>();

        List<int> positive = new List<int>();

        List<int> zero = new List<int>();

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

        {

            if(arr[i] < 0)

            {

                negative.Add(arr[i]);

            }

            else if (arr[i] > 0)

            {

                positive.Add(arr[i]);

            }

            else

            {

                zero.Add(arr[i]);

            }

        }

        List<int> arrRes = new List<int>();

        foreach(var i in negative)

        {

            arrRes.Add(i);

        }

        foreach(var i in positive)

        {

            arrRes.Add(i);

        }

        foreach(var i in zero)

        {

            arrRes.Add(i);

        }

        foreach(var i in arrRes)

        {

            Console.Write(i);

        }

        var res = arrRes.ToArray();

    }

}