01. Sum Factorial Even Digits

namespace _01.SumFactorialEvenDigits
{
    internal class Program
    {
        static void Main(string[] args)
        {
            int input = int.Parse(Console.ReadLine());
            int[] digits = IntToArray(input);
            int sum = 0;

            for (int i = 0; i < digits.Length; i++)
            {
                if (digits[i] % 2 == 0)
                {
                    int factorial = 1;

                    for (int j = 1; j <= digits[i]; j++)
                    {
                        factorial *= j;
                    }
                    sum += factorial;
                }
                else
                {
                    continue;
                }
            }
            Console.WriteLine(sum);


            static int[] IntToArray(int input)
            {
                List<int> result = new List<int>();

                while (input > 0)
                {
                    int digit = input % 10;
                    result.Add(digit);
                    input /= 10;
                }
                return result.ToArray();
            }
        }
    }
}