PYTHON PROBLEM 315 · Interview-Level

Merge accounts by shared email: Shared email merge

Combine account rows that belong to the same person through a shared email.

union-find · hash map · company screenunion-findhash mapcompany screen

PROBLEM OVERVIEW

What this Python exercise asks you to practise

This scenario tests merge accounts by shared email. It belongs to the Graphs and Connectivity roadmap and uses the union-find · hash map · 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 · hash map · company screen. Be ready to explain the input, the rule, the boundary cases, and why the chosen approach is appropriate.