using System;
using System.Text.RegularExpressions;
public class Test
{
public static void Main()
{
var someNumberString = "10009003";
string s = @"(?<=[1-9]0*)(?=[1-9])";
string[] strArray = Regex.Split(someNumberString, s);
Console.Write(string.Join(" ", strArray));
}
}
dXNpbmcgU3lzdGVtOwp1c2luZyBTeXN0ZW0uVGV4dC5SZWd1bGFyRXhwcmVzc2lvbnM7CgpwdWJsaWMgY2xhc3MgVGVzdAp7CglwdWJsaWMgc3RhdGljIHZvaWQgTWFpbigpCgl7CnZhciBzb21lTnVtYmVyU3RyaW5nID0gIjEwMDA5MDAzIjsgICAgIApzdHJpbmcgcyA9IEAiKD88PVsxLTldMCopKD89WzEtOV0pIjsKc3RyaW5nW10gc3RyQXJyYXkgPSBSZWdleC5TcGxpdChzb21lTnVtYmVyU3RyaW5nLCBzKTsKQ29uc29sZS5Xcml0ZShzdHJpbmcuSm9pbigiICIsIHN0ckFycmF5KSk7Cgl9Cn0=