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北京大学《ACM/ICPC大学生程序设计竞赛训练》暑期课面向全球招生!

alltotal是所有听力比i小的牛的x坐标总和吧

Posted by 415599088 at 2011-08-04 14:44:20 on Problem 1990 and last updated at 2011-08-04 14:49:43
In Reply To:多次失败后,AC了,发解题报告,应该是比较详细的。树状数组做的 Posted by:AllenLSY at 2010-08-27 19:25:27


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