N-Repeated Element in Size 2N Array: coding question

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Given an array of length 2n containing n+1 distinct values where exactly one value appears n times, return the value that is repeated n times. The core challenge is to identify the element with frequency n (detectable in linear time using frequency tracking or a set thanks to the guaranteed repetition).

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Leetcode 961. N-Repeated Element in Size 2N Array
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N-Repeated Element in Size 2N Array

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N-Repeated Element in Size 2N Array

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