The number of Staff members entering the precinct at 12:00 hrs and 13:00 hours respectively couldn't have been:
0,0
0,0
If no staff member would have entered at 12:00 hrs and 13:00 hrs, no staff member would have left at 15:00 hrs (after 2 or 3 hrs). But it is not possible as 6 people left at 15:00 hrs and not more than 2 priests and 2 devotees could leave at the same time.