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I have always wished that my computer would be as easy to use as my telephone. My wish has come true. I no longer know how to use my telephone. |
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Actually, the «O(log n)» algorithm is not O(n log n) but O(n^a) where a single call is also O(n^a). If you use naïve long multiplication, a is 2; if you use Karatsuba multiplication, a is log(3)/log(2), which is better.
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