//BROBBEY, MICHAEL BOAMPONG 

//CCP 1103 - SECTION

//FIBONACCI FACTORIAL SUM

using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Fibonacci Factorial Sum");

        Console.Write("Enter a number: ");

        int num = Int32.Parse(Console.ReadLine());

        long answer = 1;

        int value1 = 0;

        int value2 = 1;

        int value3;

        long fact;

        if (num <= 0)

        {

            Console.WriteLine("Zero or negative inout is not allowed.");

        }

        else if (num >=7)

        {

            Console.WriteLine("1-6 only");

        }

        else if (num >=1)

        {

            for (int i = 0; i < num-1; i++){

                fact = 1;

                value3 = value1 + value2;

                value1 = value2;

                value2 = value3;

​

             for (int j = 1; j <= value3; j++){

                fact *= j;

             } answer += fact;

        }

        Console.Write("The fibonacci factorial Sum is {0}.", answer.ToString("#,##0"));

        }

    }

}