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DIY: Accounts Merge

Explore how to merge multiple user accounts by detecting shared email addresses using data structures and algorithms. This lesson equips you to solve real interview challenges like those at Amazon by consolidating account information efficiently.

Problem statement

In this challenge, you are given a 2D array called accounts. Each element in accounts[i] is an array of strings in which accounts[i][0] is a name and the remaining elements are email, representing the emails associated with that account.

Your task is to merge these accounts such that two accounts belonging to the same person ...