Our implementation of shortestPathLengths in Code Fragment 14.13 relies on use of ?infinity? as a numeric value,

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Our implementation of shortestPathLengths in Code Fragment 14.13 relies on use of ?infinity? as a numeric value, to represent the distance bound for vertices that are not (yet) known to be reachable from the source. Reimplement that method without such a sentinel, so that vertices, other than the source, are not added to the priority queue until it is evident that they are reachable.

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Data Structures and Algorithms in Java

ISBN: 978-1118771334

6th edition

Authors: Michael T. Goodrich, Roberto Tamassia, Michael H. Goldwasser

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