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北京大学《ACM-ICPC竞赛训练》暑期课面向全球招生。容量有限,报名从速!

注意行和列 为 1-100 而 人的个数可能为 100*100/2 =5000

Posted by NJUT1401140226 at 2016-09-03 20:41:05 on Problem 2195
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