Aditya
Aditya

Reputation: 5619

What are the differences between segment trees, interval trees, binary indexed trees and range trees?

What are differences between segment trees, interval trees, binary indexed trees and range trees in terms of:

Please do not just give definitions.

Upvotes: 250

Views: 52141

Answers (3)

icc97
icc97

Reputation: 12833

Not that I can add anything to Lior's answer, but it seems like it could do with a good table.

One Dimension

k is the number of reported results

Operation Segment Interval Range Indexed
Preprocessing n logn n logn n logn n logn
Query k+logn k+logn k+logn logn
Space n logn n n n
Insert/Delete logn logn logn logn

Higher Dimensions

d > 1

Operation Segment Interval Range Indexed
Preprocessing n(logn)^d n logn n(logn)^d n(logn)^d
Query k+(logn)^d k+(logn)^d k+(logn)^d (logn)^d
Space n(logn)^(d-1) n logn n(logn)^(d-1)) n(logn)^d

Upvotes: 37

Asad-ullah Khan
Asad-ullah Khan

Reputation: 1853

The bounds for preprocessing and space for segment trees and binary indexed trees can be improved:

Upvotes: 2

Lior Kogan
Lior Kogan

Reputation: 20648

All these data structures are used for solving different problems:

  • Segment tree stores intervals, and optimized for "which of these intervals contains a given point" queries.
  • Interval tree stores intervals as well, but optimized for "which of these intervals overlap with a given interval" queries. It can also be used for point queries - similar to segment tree.
  • Range tree stores points, and optimized for "which points fall within a given interval" queries.
  • Binary indexed tree stores items-count per index, and optimized for "how many items are there between index m and n" queries.

Performance / Space consumption for one dimension:

  • Segment tree - O(n logn) preprocessing time, O(k+logn) query time, O(n logn) space
  • Interval tree - O(n logn) preprocessing time, O(k+logn) query time, O(n) space
  • Range tree - O(n logn) preprocessing time, O(k+logn) query time, O(n) space
  • Binary Indexed tree - O(n logn) preprocessing time, O(logn) query time, O(n) space

(k is the number of reported results).

All data structures can be dynamic, in the sense that the usage scenario includes both data changes and queries:

  • Segment tree - interval can be added/deleted in O(logn) time (see here)
  • Interval tree - interval can be added/deleted in O(logn) time
  • Range tree - new points can be added/deleted in O(logn) time (see here)
  • Binary Indexed tree - the items-count per index can be increased in O(logn) time

Higher dimensions (d>1):

  • Segment tree - O(n(logn)^d) preprocessing time, O(k+(logn)^d) query time, O(n(logn)^(d-1)) space
  • Interval tree - O(n logn) preprocessing time, O(k+(logn)^d) query time, O(n logn) space
  • Range tree - O(n(logn)^d) preprocessing time, O(k+(logn)^d) query time, O(n(logn)^(d-1))) space
  • Binary Indexed tree - O(n(logn)^d) preprocessing time, O((logn)^d) query time, O(n(logn)^d) space

Upvotes: 400

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