static bool[] minutesArray = new bool[7 * 24 * 60];
        static int countMinutes(string s)
        {
            if (string.IsNullOrEmpty(s))
                return 0;

            var schedulerList = s.Split('\n');
            var offset = 1440;

            foreach (var item in schedulerList)
            {
                var dayList = item.Split(' ');
                var minutesList = convertStringToMinutes(dayList[1]);

                switch (dayList[0])
                {
                    case "Mon":
                        fillTable(minutesList[0], minutesList[1]);
                        break;
                    case "Tue":
                        fillTable(offset + minutesList[0], offset + minutesList[1]);
                        break;
                    case "Wen":
                        fillTable(offset * 2 + minutesList[0], offset * 2 + minutesList[1]);
                        break;
                    case "Thu":
                        fillTable(offset * 3 + minutesList[0], offset * 3 + minutesList[1]);
                        break;
                    case "Fri":
                        fillTable(offset * 4 + minutesList[0], offset * 4 + minutesList[1]);
                        break;
                    case "Sat":
                        fillTable(offset * 5 + minutesList[0], offset * 5 + minutesList[1]);
                        break;
                    case "Sun":
                        fillTable(offset * 6 + minutesList[0], offset * 6 + minutesList[1]);
                        break;
                }

            }


            return 0;
        }

        static List<int> convertStringToMinutes(string hoursRange)
        {
            var hours = hoursRange.Split('-');
            var minutesList = new List<int>();

            foreach (var hour in hours)
            {
                var dt = Convert.ToDateTime(hour);
                var minutes = dt.Hour * 60 + dt.Minute;
                minutesList.Add(minutes);
            }

            return minutesList;
        }

        static void fillTable(int start, int end)
        {
            for (int i = start; i < end; i++)
            {
                minutesArray[i] = true;
            }
        }