using System;

public class AustriaSocialSecurityNumber

{

    public static void Main()

    {

        bool isValid = isValidASSN("1237010180");

        Console.WriteLine(isValid);

    }

    private static bool authenticateFirstDigits(int fdigit)

    {

        if (fdigit >= 100) return true;

        return false;

    }

    private static int getReminder(string assn)

    {

        int[] multiply = {3, 7, 9, 5, 8, 4, 2, 1, 6};

        int addition = 0;

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

        {

            addition += (Convert.ToInt32(assn[i]) - 48) * multiply[i];

        }

        int answer = addition % 11;

        return answer;

    }

    private static bool isValidASSN(string assn)

    {

        if (assn.Length != 10) return false;

        foreach (char ch in assn)

        {

            if (char.IsLetter(ch)) return false;

        }

        int firstdigits = Convert.ToInt32(assn.Substring(0,3));

        if (!authenticateFirstDigits(firstdigits)) return false;

        int wholestring_check = Convert.ToInt32(assn[3]) - 48;

        string wholestring = assn.Remove(3,1);

        int wholestring_reminder = getReminder(wholestring);

        if (wholestring_reminder != wholestring_check) return false;

        return true;

    }

}