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很好奇地问一句~~~~~~~这个问题有几种不同的做法？

Posted by star6 at 2007-07-16 09:05:15 on Problem 3264 
区间统计的问题。。。。。。。。。。太普遍了。。。。



除了线段树应该还有很多别的方法吧？
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