Shortest paths are not always unique: sometimes there are two or more different paths with the minimum
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Question:
Shortest paths are not always unique: sometimes there are two or more different paths
with the minimum possible length. Show how to solve the following problem in O(( |V | +
|E| ) log |V | ) time.
Input: An undirected graph G = (V, E); edge lengths le > 0; starting vertex s ∈S .
Output: A Boolean array usp[·]: for each node u, the entry usp[u] should be true if and
only if there is a unique shortest path from s to u. (Note: usp[s] = true.)
Related Book For
Applied Physics
ISBN: 978-0132109277
10th Edition
Authors: Dale ewen, Neill schurter, P. erik gundersen
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