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the minimal number of elements in a set原来是集合中元素的最少个数的意思 ==。而且说的是每一个区间

Posted by liuyu523115237 at 2011-08-09 16:05:05 on Problem 1716 and last updated at 2011-08-10 15:48:31
In Reply To:Re:这题是什么意思啊，高人指点一下，谢了！！！ Posted by:yuanyirui at 2007-03-13 13:04:53 
在n个集合中，每个集合至少去2个不同的元素。使形成的新的集合元素最少
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