September 2019
Intermediate to advanced
816 pages
18h 47m
English
Content preview from Java Coding Problems
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126. Union Find
The Union Find algorithm operates on a disjoint-set data structure.
A disjoint-set data structure defines sets of elements separated in certain disjoint subsets that are not overlapping. Graphically, we can represent a disjoint-set with three subsets, as in the following diagram:
In the code, a disjoint-set is represented as follows:
- n is the total number of elements (for example, in the preceding diagram, n is 11).
- rank is an array initialized with 0 that is useful to decide how to union two subsets with multiple elements (subsets with lower rank become children of subsets with a higher rank).
- parent is the array that allows ...
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