using System;

    using System.Collections.Generic;

    using System.Linq;

    public class Program

    {

        private static Dictionary<int, int> _holeMap = new Dictionary<int, int>

        {

            { 0, 1 },

            { 1, 0 },

            { 2, 0 },

            { 3, 0 },

            { 4, 1 },

            { 5, 0 },

            { 6, 1 },

            { 7, 0 },

            { 8, 2 },

            { 9, 1 }                

        };

        public static void Main()

        {

            int numero = 12345678;

            int check = CountHoles(numero);

            Console.WriteLine(check);   

        }

        public static int CountHoles(int num){

            var digits = num

                .ToString()

                .Select(c => int.Parse(c.ToString()));

            return digits.Sum(d => _holeMap[d]);

        }

    }