Question: Order statistics. You are given a DVD-ROM storing n values and wish to find the median. Since the disk is read-only, you cannot swap or

Order statistics. You are given a DVD-ROM storing n values and wish to find the median. Since the disk is read-only, you cannot swap or move elements. Your computer has O(log n) read/write memory, so you cant simply copy the DVD into memory. Give an O(n log n) expected-time algorithm to find the median without writing to disk. Prove correctness of your algorithm.

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