public void Algorithm()
        {
            // in another class
            // number of time-space slots
            int size = (int)_slots.Count;
            // place classes at random position
            LinkedList <CourseClass> c = Counts.GetInstance().GetCourseClasses();

            for (LinkedList <CourseClass> .Enumerator it = c.GetEnumerator(); it.MoveNext();)
            {
                // determine random position of class
                int nr   = Counts.GetInstance().GetNumberOfRooms();
                int dur  = it.Current.GetDuration();
                int day  = RandomNumbers.NextNumber() % DefineConstants.DAYS_NUM;
                int room = RandomNumbers.NextNumber() % nr;
                int time = RandomNumbers.NextNumber() % (DefineConstants.DAY_HOURS + 1 - dur);
                int pos  = day * nr * DefineConstants.DAY_HOURS + room * DefineConstants.DAY_HOURS + time;

                // fill time-space slots, for each hour of class
                for (int i = dur - 1; i >= 0; i--)
                {
                    _slots[pos + i].AddLast(it.Current);
                    //_slots.at(pos + i).push_back(*it);
                }
            }
        }
 public Schedule()
 {
     _slots.Resize(DefineConstants.DAYS_NUM * DefineConstants.DAY_HOURS * Counts.GetInstance().GetNumberOfRooms());
 }