Book Problem

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

namespace ConsoleApplication4
{
    class Program
    {
        static void Main(string[] args)
        {
            long pageCount = long.Parse(Console.ReadLine());
            int campingDays = int.Parse(Console.ReadLine());
            int normalDay = int.Parse(Console.ReadLine());
            double months1 = 0;



                int years = 0;
                double months = 0;
                long divider = (30 - campingDays) * normalDay;
                if (divider <= 0 || campingDays >= 30)
                {
                    Console.WriteLine("never");
                }
                else
                {
                    months = Math.Ceiling(pageCount / (double)divider);
                    years = (int) (months / 12);
                    months = months % 12;
                    Console.WriteLine("{0} years {1} months", years, (int)months);
                    }









        }
    }
}