using System;

public class Program

{

    static int fibonacciseries(int n)

    {

        int result=0;

        int firstnumber=0;

        int secondnumber=1;

        if(n==0) return 0;

        if(n==1) return 1;

        for(int i=2; i<=n;i++)

        {

            result=firstnumber+secondnumber;

            firstnumber=secondnumber;

            secondnumber=result;

        }

        return result;

    }

    public static void Main()

    {

        Console.WriteLine("Enter Number");

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

        for(int i=0;i<length;i++)

        {

            Console.Write("{0}", fibonacciseries(i));

        }

        Console.ReadLine();

    }

}