flow

How do I control flow of PHP multi-page form?

Hi There, I am a bit of a PHP newb I have developed a multi-page form which works fine at the moment - each stage is on another page (I use the session to retain the data). However I know that users don't always use these forms the way you want! I want to control the flow of the form. I would like the user to be able to use the browse...

A network flow problem

I am recently preparing for the acm-icpc contest. Here I want to know how to find the minimum flow with the least cost given the condition that each edge in the graph has a capacity C, a cost V, and a lowerbound flow L (L ≤ C). ...