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Mar 2, 2022 · Fundamentals
Union-Find Solution for Determining Friend Circles (Alibaba Interview Question)
This article explains an Alibaba interview problem about counting friend circles using the union‑find (disjoint set) data structure, provides a detailed conceptual analysis, visual illustrations, and a complete C++ implementation that determines whether two people belong to the same circle and computes the total number of distinct circles.
C++Friend Circledisjoint-set
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