Sublogarithmic searching without multiplications

  • Authors:
  • A. Andersson

  • Affiliations:
  • -

  • Venue:
  • FOCS '95 Proceedings of the 36th Annual Symposium on Foundations of Computer Science
  • Year:
  • 1995

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Abstract

We show that a unit-cost RAM with word length w can maintain an ordered set of w-bit integers (or binary strings) under the operations search, insert, delete, nearest neighbour in O(/spl radic/(logn)) worst-case time and range queries in O(/spl radic/(logn)+size of output) worst-case time. The operations rely on AC/sup 0/ instructions only, thereby solving an open problem posed by Fredman and Willard. The data structure is simple. We also present a static data structure that can process a set of /spl Theta/O(logn) searches in O(lognloglogn) time.