using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("до какого числа считать ряд Фибонанчи");

        int number = Convert.ToInt32(Console.ReadLine());

        int perv = 1;

        Console.Write("{0}", perv);

        int vtor = 1;

        Console.Write("{0}", vtor);

        int sum = 0;

        while (number >= sum)

        {

            sum = perv + vtor;

            Console.Write("{0}", sum);

            perv = vtor;

            vtor = sum;

        }

    }

}