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I don't see a need to group by Name theoretically unless there are multiple names for same Hacker ID. The test fails unless you group by Name. Without seeing what is in the test input, I really can't tell what this is about.
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I don't see a need to group by Name theoretically unless there are multiple names for same Hacker ID. The test fails unless you group by Name. Without seeing what is in the test input, I really can't tell what this is about.