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A comment on I cheated on my Microsoft interview (2019). Parent comment

Re:I cheated on my Microsoft interview (2019) by curiousgal on Sunday June 05, 2022 @05:28AM (#31629328)
Could also just use a hashtable, the keys are the array elements and the items are the occurrence of each element, then return the one with an occurrence of 2.
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Re:I cheated on my Microsoft interview (2019) by 3np on Sunday June 05, 2022 @05:59AM (#31629521)
Or just a hashset and return when about to insert an existing element.
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