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Re:O(1)时间就可以判断出来是降序还是升序In Reply To:非降序也属于有序吧。这样你的A[i]-A[j]=i-j就没有什么意义了，因为可能有重复元素 Posted by:wywcgs at 2008-10-23 18:39:25 Followed by:
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