Question: - An array A contains n 1 unique integers in the range [0, n - 1]; that is, there is one number from this
- An array A contains n 1 unique integers in the range [0, n - 1]; that is, there is one number from this range that is not in A. Design an O(n)-time algorithm (write a pseudo-code, Python function or Java method) for finding that number. You can use only O(1) additional space beside array A.
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