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Re:刚在zoj上交也AC了

Posted by wpc0000 at 2007-03-03 13:43:51 on Problem 1470
In Reply To:刚在zoj上交也AC了 Posted by:xiaolonghingis at 2006-09-06 20:28:49
注意:"A node can be its own ancestor (for example in Figure 1 the ancestors of node 2 are 2 and 5)"

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