using System;

using System.Globalization;

public class Program

{

    public static void Main()

    {

        var cedula = "1.017.204.030";

        var style = NumberStyles.AllowThousands;

        var provider = new CultureInfo("es-CO");

        if(long.TryParse(cedula, style, provider, out long numero)){

            Console.WriteLine(numero);

        }

        else{

            Console.WriteLine("Numero malo");

        }

    }

}