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稀里糊涂就过了,求正解?????

Posted by 449554866 at 2011-03-06 13:01:03 on Problem 2299 and last updated at 2011-03-06 13:03:30
数据好大啊!!!!!直接用的归并,WA了无数次,然后索性把所有的变量都改成了int64,就过了。。。。。
可我还是不知道这是什么,大牛给讲讲这道题呗..

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