using System;
using System.Linq;
using System.Text.RegularExpressions;
public class Test
{
public static void Main()
{
var s = "13+7-4/2+12";
string[] tokens = Regex.Matches(s, @"\d+|[-+/*()]").Cast<Match>().Select(m => m.Value).ToArray();
Console.WriteLine(string.Join("\n", tokens));
}
}
dXNpbmcgU3lzdGVtOwp1c2luZyBTeXN0ZW0uTGlucTsKdXNpbmcgU3lzdGVtLlRleHQuUmVndWxhckV4cHJlc3Npb25zOwoKcHVibGljIGNsYXNzIFRlc3QKewogIHB1YmxpYyBzdGF0aWMgdm9pZCBNYWluKCkKICB7CiAgICB2YXIgcyA9ICIxMys3LTQvMisxMiI7CiAgICBzdHJpbmdbXSB0b2tlbnMgPSBSZWdleC5NYXRjaGVzKHMsIEAiXGQrfFstKy8qKCldIikuQ2FzdDxNYXRjaD4oKS5TZWxlY3QobSA9PiBtLlZhbHVlKS5Ub0FycmF5KCk7CiAgICBDb25zb2xlLldyaXRlTGluZShzdHJpbmcuSm9pbigiXG4iLCB0b2tlbnMpKTsKICB9Cn0=