Example:
ksar@ksar-laptop:~/Work/dojo$ php placing.php 4
[2015-04-18 09:20:43] INFO: Max execution time: 60 seconds
[2015-04-18 09:20:43] INFO: Input data: 4x4, 4 items
[2015-04-18 09:20:43] ... #1 ( 2,4,1,3 )
[2015-04-18 09:20:43] ... #2 ( 3,1,4,2 )
[2015-04-18 09:20:43] INFO: All items successfully placed
[2015-04-18 09:20:43] ... last results in "ksar-4-1.csv"
ksar@ksar-laptop:~/Work/dojo$ php placing.php 5 3
[2015-04-18 09:31:08] INFO: Max execution time: 180 seconds
[2015-04-18 09:31:08] INFO: Input data: 5x5, 5 items
[2015-04-18 09:31:08] ... #1 ( 1,3,5,2,4 )
[2015-04-18 09:31:08] ... #2 ( 1,4,2,5,3 )
[2015-04-18 09:31:08] ... #3 ( 2,4,1,3,5 )
[2015-04-18 09:31:08] ... #4 ( 2,5,3,1,4 )
[2015-04-18 09:31:08] ... #5 ( 3,1,4,2,5 )
[2015-04-18 09:31:08] ... #6 ( 3,5,2,4,1 )
[2015-04-18 09:31:08] ... #7 ( 4,1,3,5,2 )
[2015-04-18 09:31:08] ... #8 ( 4,2,5,3,1 )
[2015-04-18 09:31:08] ... #9 ( 5,2,4,1,3 )
[2015-04-18 09:31:08] ... #10 ( 5,3,1,4,2 )
[2015-04-18 09:31:08] INFO: All items successfully placed
[2015-04-18 09:31:08] ... last results in "ksar-5-3.csv"