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Original Articles

An efficient algorithm for estimating rotation distance between two binary trees

, &
Pages 1095-1106 | Received 06 Oct 2004, Published online: 19 Aug 2006
 

Abstract

There are a number of ways of measuring the difference in shape between two rooted binary trees with the same number of leaves. Pallo (Computer Journal, 9, 171–175, 1986) introduced a left weight sequence, which is a sequence of positive integers, to characterize the structure of a binary tree. By applying the AVL tree transformation on binary trees, we develop an algorithm for the efficient transformation of the left weight sequences between two binary trees.

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