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Find conflicting employee emails

Write codeMedium14 min

Your task

Two HR systems were merged, and the combined feed has rows "id,email". The same id may appear many times; identical repeats are fine, but an id listed with two or more DIFFERENT emails is a data conflict that must be escalated. Return the conflicting ids, sorted ascending. Example: ["e1,ava@co.io", "e2,raj@co.io", "e1,ava@old.io"] gives ["e1"].

Examples

conflicting_ids(rows: list[str]) -> list[str]
Example 1
Inputconflicting_ids(["e1,ava@co.io", "e2,raj@co.io", "e1,ava@old.io"])
Output["e1"]