From:	Damian Yerrick <Bullcr_pd_yerrick AT hotmail DOT comRemoveBullcr_p>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: OT: Which newsgroup to ask an algorithm related programming question
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Date:	Thu, 11 Jan 2001 01:50:51 GMT
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please stand up:
http://slashdot.org/articles/00/09/22/0243231.shtml#41


On Tue, 09 Jan 2001 06:00:46 GMT, Robin Johnson <robbat2 AT home DOT com>
wrote:

>I haven't had any luck finding the right newsgroup to ask my question,
>so i'll ask it here in the hopes that some of the regulars can redirect me to
>the proper place, (or provide an answer anyway).

You might want to search Deja News <http://www.deja.com/> for similar
topics.

>I'm looking into writing a piece of software to aid with the local transit
>system, but I have hit a problem, I need a good algorithm (or easily 
>modifiable) implementation of a shortest path algorithm for a one-pair set, 
>in a system that will have many edges, and all positive weights, and it 
>MUST record the path.
>
>I've look at both Dijkstra's & Bellman-Ford's algorithms, but I don't see
>how they can be modified to record the path.

They record the path implicitly.  The version of Dijkstra's algorithm
that I learned stores with each node the length of the shortest path
to that node and the node you just came from.  Tracing back from the
destination to the source to get the path is as easy as traversing a
linked list.

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