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Re: 是O(mn)吧,m表示数据范围,n表示长度。In Reply To:算逆序数可以O(n)完成的 Posted by:nightelf at 2007-08-28 12:35:42 不要因为只有4种输入,就误认为O(4n)=O(n) 事实上复杂度为n(m-1) Followed by:
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