The level Ancestor problem simplified

Michael A. Bender, Martín Farach-Colton

Research output: Chapter in Book/Report/Conference proceedingConference contribution

17 Scopus citations


We present a very simple algorithm for the Level Ancestor Problem. A Level Ancestor Query LA(v, d) requests the depth d ancestor of node v. The Level Ancestor Problem is thus: preprocess a given rooted tree T to answer level ancestor queries. While optimal solutions to this problem already exist, our new optimal solution is simple enough to be taught and implemented.

Original languageEnglish (US)
Title of host publicationLATIN 2002
Subtitle of host publicationTheoretical Informatics - 5th Latin American Symposium, Proceedings
EditorsSergio Rajsbaum
PublisherSpringer Verlag
Number of pages8
ISBN (Electronic)3540434003, 9783540434009
StatePublished - 2002
Externally publishedYes
Event5th Latin American Symposium on Theoretical Informatics, LATIN 2002 - Cancun, Mexico
Duration: Apr 3 2002Apr 6 2002

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349


Other5th Latin American Symposium on Theoretical Informatics, LATIN 2002

All Science Journal Classification (ASJC) codes

  • Theoretical Computer Science
  • Computer Science(all)


Dive into the research topics of 'The level Ancestor problem simplified'. Together they form a unique fingerprint.

Cite this