using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Invalid_Number
{
    class Program
    {
        static void Main(string[] args)
        {
            var a = int.Parse(Console.ReadLine());

            if (!(a == 0) && !(a >= 100) && !(a <= 200))
            {
                Console.WriteLine("invalid");
            }
            else if((a < 0) || (a < 100) || (a > 200))
            {
                Console.WriteLine("invalid");
            }


        }
    }
}