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0本来就该是1,有什么奇怪的。

Posted by tdzl2003 at 2005-07-27 20:51:54 on Problem 2506
公式是这样的,f(n)=f(n-1)+2*f(n-2)
f(1)是1,f(2)是3,f(0)不就是1了么:D

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