PYTHON PROBLEM 154 · Advanced

Count connected components with union-find

Count groups of vertices connected by undirected edges.

union-find · graph · company screenunion-findgraphcompany screen

PROBLEM OVERVIEW

What this Python exercise asks you to practise

This scenario tests count connected components with union-find. It belongs to the Graphs and Connectivity roadmap and uses the union-find · graph · company screen pattern.

Graph representation, BFS, DFS, shortest paths, topological order, and union-find.

COMPLETE WORKSPACE

Learn the plan, trace the logic and run the solution

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SKILL TO CARRY FORWARD

Pattern relevance

This exercise strengthens union-find · graph · company screen. Be ready to explain the input, the rule, the boundary cases, and why the chosen approach is appropriate.