OK. And then the exponentials, as you saw is when typically I reduce the problem of one size into two or more sub-problems of a smaller size.

好，然后说到指数级，正如你所见，典型的例子是,我讲一个问题分解成为,两个更小规模的子问题。

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That this recursive call had two sub-problems of a smaller size, not one.

而不是一个,这会有很大的不同。

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