Question: Input is an array of 'n' arbitrary real numbers (where n is odd). The array has (n + 1)/2 distinct numbers such that each number

Input is an array of 'n' arbitrary real numbers (where n is odd). The array has (n + 1)/2 distinct numbers such that each number has exactly two copies excepting for one number. Present an O(n) time algorithm to identify the unique number.

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