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Leetcode 721. Accounts Merge

Given lists of accounts where each account has a name and emails, merge accounts that share any email by grouping connected emails (e.g., via union-find or graph traversal) and return each person's name with their sorted unique emails. Note names alone don't imply same person — connectivity is determined solely by shared email addresses.

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Late October, 2025

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Senior

Late July, 2025

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Mid-level

Late May, 2025

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Mid-level

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