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疑问

Posted by hlwt at 2013-02-01 15:28:56 on Problem 2991
In Reply To:打广告,此题解答以及大量线段树题目http://www.notonlysuccess.com/?p=59 Posted by:notonlysuccess at 2009-11-29 23:57:38
对于你所给样例的第一个操作,为什么y会变成负的呢,在纸上话一下就会发现应该是正的。。。或者说我理解错了。。

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