Data structures and algorithms for the string statistics problem


Given a textstringx of lengthn, theMinimal Augmented Suffix Tree T (x) ofx is a digital-search index that returns, for anyquery stringw and in a number of comparisons bounded by the length ofw, the maximum number of nonoverlapping occurrences ofw inx. It is shown that, denoting the length ofx byn, T(x) can be built in timeO(n log2 n) and spaceO(n logn), off-line on a RAM.

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Additional information

This research was supported in part, through the Leonardo Fibonacci Institute, by the Istituto Trentino di Cultura, Trento, Italy.

Additional support was provided by NSF Grants CCR-8900305 and CCR-9201078, by NATO Grant CRG 900293, by the National Research Council of Italy, and by the ESPRIT III Basic Research Programme of the EC under Contract No. 9072 (Project GEPPCOM).

Additional support was provided by NSF Grant CCR-91-96176 and ONR Contract N 00014-91-J-4052, ARPA Order 2225.

Communicated by C. K. Wong.

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Apostolico, A., Preparata, F.P. Data structures and algorithms for the string statistics problem. Algorithmica 15, 481–494 (1996).

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Key words

  • Design and analysis of algorithms
  • Combinatorics on strings
  • Pattern matching
  • Substring statistics
  • Suffix tree
  • Augmented suffix tree
  • Period of a string
  • Repetition in a string