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klodolph
on Feb 24, 2010
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Why you should never, ever, ever use fibonacci for...
The closed form solution isn't O(1). It's Ω(2^N) since the number of digits in the output is Θ(2^N).
InclinedPlane
on Feb 24, 2010
[–]
On the most prevalent electronic computers of our time the closed form solution is effectively constant-time if the output is bounded to be within the limits of a 32 or 64 bit integer.
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