using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] yourstr = new string[] { "1,2,3", "1,2,-3", "1-2-3","dd.dd" };
            Regex re = new Regex(@"^(\d+[,-])*\d+$");
            foreach (string s in yourstr)
            {
                Console.WriteLine("{0} {1}",s,re.Match(s).Success);
            }
        }
    }
}