Friend Circles

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# Tag: unionfind

## Leetcode: Friend Circles

## Leetcode: Number of Connected Components in an Undirected Graph

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## Leetcode: Sentence Similarity II

## Review: Union Find Problems

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## Leetcode: Accounts Merge

Number of Connected Components in an Undirected Graph

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Union find is helpful to build relationship among different sets

Key operations: union, find, etc.

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