Amazon Interview Question: Pull a random integer from the range 1, ..., N. Shuffle. Find missing integer, without re-sorting. Solution is to used closed-form sum of first N integers.

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Amazon Software Development Engineer interview

Amazon interview question

Software Development Engineer Interview

Pull a random integer from the range 1, ..., N. Shuffle. Find missing integer, without re-sorting. Solution is to used closed-form sum of first N integers.

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