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NeetCode 150 / Graphs
11.11 · Problem

Number of Connected Components in an Undirected Graph

Medium Union-Find counting merges 1 video LC 323 Pro

This problem is part of solulu Pro

There are n nodes labelled 0 to n − 1 and a list of undirected edges. Return the number of connected components.

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Item 90 of 150 · updated 2026-10-12