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dijkstra - Online in the Cloud

Run dijkstra in OnWorks free hosting provider over Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

This is the command dijkstra that can be run in the OnWorks free hosting provider using one of our multiple free online workstations such as Ubuntu Online, Fedora Online, Windows online emulator or MAC OS online emulator

PROGRAM:

NAME


dijkstra - single-source distance filter

SYNOPSIS


dijkstra [ -adp? ] [ sourcenode file ]

DESCRIPTION


dijkstra reads a stream of graphs and for each computes the distance of every node from
sourcenode. Edge length is given in the len attribute, and the default is 1. The dist
attribute of every node is set to its distance from sourcenode. If the -p flag is used,
the prev attribute of each node reachable from sourcenode is set to the name of the
previous node on a shortest path. The graph attribute maxdist is set to the maximum dist
of all nodes in the graph.

If the -d flag is used, the graph is treated as directed and only forward edges are used.

By default, if the graph is disconnected, the dist attribute of nodes unreachable from
sourcenode are left untouched, and maxdist is set to the maximum of any previous value and
the largest distance recorded in this run. On the other hand, if the -a flag is used, the
dist attribute of an unreachable node is assigned a very large value, and maxdist records
the maximum distance found in the component containing sourcenode.

Any number of sourcenode file pairs may be given. If the last file is missing, stdin is
used. All output is written to stdout.

In a typical application, dist and maxdist can drive a downstream calculation of color or
some other attribute.

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