The instances are kindly provided by Thiago Alves de Queiroz.

Each file is organized as follows:

- Number of items
- Number of conflicts
- Size of the rectangular bin W x H

- 1st item w x h and value (if 0 means equal to item's area)
- 2nd item. . . and so on

- 1st pair of items conflicting each other
- 2nd pair of items . . . and so on

- Instance name 
- Other file information