Grokking the Coding Interview: Patterns for Coding Questions
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Introduction to Union Find Pattern
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Union Find, also known as Disjoint Set Union (DSU), is a data structure that keeps track of a partition of a set into disjoint subsets (meaning no set overlaps with another). It provides two primary operations: find, which determines which subset a particular element is in, and union, which merges two subsets into a single subset. This pattern is particularly useful for problems where we need to find whether 2 elements belong to the same group or need to solve connectivity-related problems in a graph or tree.

Core Operations of Union-Find (Disjoint Set Union - DSU):

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