class Program
{
    static void Main()
    {
        Console.WriteLine("Enter a number: ");
        int N = Convert.ToInt32(Console.ReadLine());

        int first = 0;
        int second = 1;

        Console.WriteLine("Fibonacci Series");

        for(int i = 1; i <= N; i++)
        {
            Console.Write(first + " ");
            int next = first + second;
            first = second;
            second = next;
        }

    }
}