+-----------------------------------+
| room 2/5  | guard 0/2             |
+-----------------------------------+
| lib 0/1   |   etc (rest of rooms) |
+-----------------------------------+
|           |           |           |
| III  pos  | III  pos  | III  pos  |
| III       | III       | III       |
| III  vig  | III  vig  | III  vig  |
|           |           |           |
+-----------+-----------+-----------+
|           |           |           |
| III  pos  | III  pos  | III  pos  |
| III       | III       | III       |
| III  vig  | III  vig  | III  vig  |
|           |           |           |
+-----------+-----------+-----------+
| con 60  | cha 75 |  Int 10 | etc  |
+-----------------------------------+