Shortest paths in directed planar graphs with negative lengths: a linear-space O(n log2 n)-time algorithm

  • Authors:
  • Philip Klein;Shay Mozes;Oren Weimann

  • Affiliations:
  • Brown University, Providence RI;Brown University, Providence RI;Massachusetts Institute of Technology, Cambridge, MA

  • Venue:
  • SODA '09 Proceedings of the twentieth Annual ACM-SIAM Symposium on Discrete Algorithms
  • Year:
  • 2009

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Abstract

We give an O(n log2 n)-time, linear-space algorithm that, given a directed planar graph with positive and negative arc-lengths, and given a node s, finds the distances from s to all nodes. The best previously known algorithm requires O(n log3 n) time and O(n log n) space.