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不是选两个源点，而是所有的点都需要作为源点被枚举一次In Reply To:Re:3 2 (0,1) (0,2) 吧自己的程序挂掉了，居然还能0秒ac。。觉得这题应该选2个源点，然后再枚举汇点 Posted by:22221111 at 2010-05-26 13:06:50 rt 数据很弱而已 Followed by:
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