10.MultiplyEvensByOdds

using System;

namespace _10.MultiplyEvensByOdds
{
    class Program
    {
        static void Main(string[] args)
        {
            int input = Math.Abs(int.Parse(Console.ReadLine()));

            Console.WriteLine(GetMultipliesOffEvenAndOdds(input));

        }

        static int GetMultipliesOffEvenAndOdds(int a)
        {
            int result = GetSumOfOddDigits(a) * GetSumEvenDigits(a);

            return result;
        }

        static int GetSumEvenDigits(int number)
        {
            int sum = 0;

            while (number != 0)
            {
                int lastDigit = number % 10;

                if (lastDigit % 2 == 0)
                {
                    sum += lastDigit;
                }

                number /= 10;
            }

            return sum;
        }
        static int GetSumOfOddDigits(int number)
        {
            int sum = 0;
            while (number != 0)
            {
                int lastDidit = number % 10;

                if (lastDidit % 2 == 1)
                {
                    sum += lastDidit;
                }

                number /= 10;
            }

            return sum;
        }
    }
}