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用邻接表建图时注意

Posted by 314911229 at 2012-04-18 13:43:17 on Problem 3281
用邻接表建图时注意奶牛拆成两个点时,如果此奶牛已经拆分成两个点了,加了边了。。
注意判断下。。不要重复插入一样的边。
wa的郁闷啊。。

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