Purely Functional Worst Case Constant Time Catenable Sorted Lists

Gerth Stølting Brodal, Christos Makris, and Kostas Tsichlas

In Proc. 14th Annual European Symposium on Algorithms, volume 4168 of Lecture Notes in Computer Science, pages 172-183. Springer Verlag, Berlin, 2006.


We present a purely functional implementation of search trees that requires O(log n) time for search and update operations and supports the join of two trees in worst case constant time. Hence, we solve an open problem posed by Kaplan and Tarjan as to whether it is possible to envisage a data structure supporting simultaneously the join operation in O(1) time and the search and update operations in O(log n) time.

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© Springer-Verlag Berlin Heidelberg 2006. All rights reserved.

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BIBTEX entry

  author = "Gerth St{\o}lting Brodal and Christos Makris and Kostas Tsichlas",
  booktitle = "Proc. 14th Annual European Symposium on Algorithms",
  doi = "10.1007/11841036_18",
  isbn = "978-3-540-38875-3",
  pages = "172-183",
  publisher = "Springer {V}erlag, Berlin",
  series = "Lecture Notes in Computer Science",
  title = "Purely Functional Worst Case Constant Time Catenable Sorted Lists",
  volume = "4168",
  year = "2006"