using System;

public class Program

{

    private static string MoveAllZeroes(char[] charArr){

        string newNumber = string.Empty;

        string zeroes = "";

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

            if (charArr[i].ToString() == "0"){

                zeroes += "0";

            }else{

                newNumber += charArr[i];

            }

        }

        return newNumber + zeroes;

    }

    public static void Main()

    {

        Console.WriteLine(MoveAllZeroes("0409380220300".ToCharArray()));

    }

}