Refer to my other comment. If you must, any constraint optimization solver will do. Here's two: [1] Example http://apmonitor.com/online/view_pass.php http://apm

Refer to my other comment. If you must, any constraint optimization solver will do. Here's two: [1] Example http://apmonitor.com/online/view_pass.php http://apmonitor.com/online/view_pass.php [2] HN Thread https://news.ycombinator.com/item?id=15530630 https://news.ycombinator.com/item?id=15530630