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by ted_dunning
698 days ago
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That's a bullshit question. My own response would have been a variant on radix-sort. Keep an array of 256 counters, and make a pass counting all of the high bytes. Now you know the high byte of the median. Make another pass keeping a histogram of the second byte of all values that match the high byte. And so on. This takes four passes and requires 256 x 8 byte counters plus incidentals. In a single pass you can't get the exact answer. |
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