using System;

public class Program

{

    public static void Main()

    {

        int a,b,c,d,e,f;

        Console.WriteLine("Ingresa un Numero");

        a=Convert.ToInt32(Console.ReadLine());

        b=1;

        c=1;

        d=1;

        if(a==1)

        {

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

        }

        if(a==2)

        {

            Console.Write("{0},{1}",b,c);

        }

        if(a==3)

        {

            Console.Write("{0},{1},{2}",b,c,d);

        }

        else

        {

            Console.Write("{0},{1},{2},",b,c,d);

        }

        for(e=3;e<a;e++)

        {

            f=b+c;

            b=c;

            c=d;

            d=f;

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

            }

​

        }

    }

​