Re: [Potassco-users] shortest path

[Martin <mj...@cs...>]

On Sat, 2012-06-09 at 13:51 +0200, Sai Pavan K Veeranki wrote:
> Dear Fellows,
> 
> I am Learning answer set programing for my project, i need to be
> honest, its really hard to understand.
> 
> I was trying to write a program for shortest path between any two
> nodes. I took the example from the guide which was running pretty
> good, i didn't understand some of the steps. I have got no clue to get
> the shortest path between two nodes.

OK; what problems were you having?  Can you be a bit more specific than
not understanding some of it?  Could you post the bits you get and the
bits you don't.

> I would like to request you guys, to let me know where i have to start
> with constraint programing. Which kind of basic knowledge would help
> me to understand the scripts of ASP.

One tip; I'd suggest you don't think of the input as a 'script' or
'program' in the conventional sense as there is no notion of procedure
or sequence.  Think of it more as a description, a specification or a
formulae.

> I am an average student, but interested in learning new stuff, so I
> need help to get hands on experience on ASP. 
> Any information like literature, books, examples, would be very much
> appreciated.

Well... if you forgive the shameless self promotion; you might want to read our paper:

A pragmatic programmer’s guide to answer set programming
http://opus.bath.ac.uk/17862/

this includes the methodology we use and a step by step worked example
of how to develop a program.  I've got an updated and expanded version
of it that I will send to you off-list.  You might also want to have a
look at the work done by the M&M ASP project of Hans Tompits.

Hope that helps.

Cheers,
 - Martin