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Understanding
the problem
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Inputs:
The end points, (lo, hi), of an ordered sequence
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Answers to an series of questions
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Outputs: A selected item
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How
the inputs are transformed to the outputs:
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A
series of questions is posed of the form
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Is the desired item after item x?
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so that the xth item is chosen
to be midway in the interval
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If
the reply is yes, the new interval
(next after x, hi)
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If
the reply is no, the new interval is (lo, x)
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The
output is the item when the interval contains only a
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single
item
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