Optimal Leaf Ordering of Complete Binary Trees

Brandes, Ulrik

Optimal Leaf Ordering of Complete Binary Trees

Dateien

Brandes_opus-117791.pdfGröße: 149.43 KBDownloads: 305

Datum

2007

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Informatik und Informationswissenschaft

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Journal of Discrete Algorithms. 2007, 5(3), pp. 546-552. Available under: doi: 10.1016/j.jda.2006.09.003

Zusammenfassung

Ordering a set of items so as to minimize the sum of distances between consecutive elements is a fundamental optimization problem occurring in many settings. While it is View the MathML source-hard in general, it becomes polynomially solvable if the set of feasible permutations is restricted to be compatible with a tree of bounded degree. We present a new algorithm for the elementary case of ordering the n leaves of a binary tree with height View the MathML source. Our algorithm requires View the MathML source time and View the MathML source space. While the running time is a log-factor away from being asymptotically optimal, the algorithm is conceptually simple, easy to implement, and highly practical. Its implementation requires little more than a few bit-manipulations.

Fachgebiet (DDC)

004 Informatik

Schlagwörter

optimal leaf ordering, bit-manipulation algorithms, permutations

Zitieren

ISO 690

BRANDES, Ulrik, 2007. Optimal Leaf Ordering of Complete Binary Trees. In: Journal of Discrete Algorithms. 2007, 5(3), pp. 546-552. Available under: doi: 10.1016/j.jda.2006.09.003

BibTex

@article{Brandes2007Optim-3022,
  year={2007},
  doi={10.1016/j.jda.2006.09.003},
  title={Optimal Leaf Ordering of Complete Binary Trees},
  number={3},
  volume={5},
  journal={Journal of Discrete Algorithms},
  pages={546--552},
  author={Brandes, Ulrik}
}

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