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哪位给组测试数据啊~

Posted by ghostxp at 2006-10-04 14:28:26 on Problem 2989 
下面这组数据应该是什么结果呢?
11 9
1 2
1 3
1 4
1 5
8 9
9 10
10 11
11 8
9 11
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