using System;

public class Fibo

{

    public static void Main(string[] args)

    {

        int n1=0,n2=1,n3, i, number;

        Console.Write("number of elements:");

        number = int.Parse(Console.ReadLine());

        Console.Write(n1+""+n2+"");

        for(i=2;i<=number;i++)

        {

            n3=n1+n2;

            Console.Write(n3+"");

            n1=n2;

            n2=n3;

        }

    }

}