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Problem 4609 >> 造样例的和写题面的有仇吗……
EdwardFrog @ 2018-05-26 00:37:18
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样例里满地都是重边
cmd2001 @ 2018-05-26 08:32:15
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题面不对,英文题面说是单向边QAQ
EdwardFrog @ 2018-05-26 08:37:26
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原来是题意出了偏差。
EdwardFrog @ 2018-05-26 10:31:05
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还有,对任意两个点i和j,i要去j一次,j也要去i一次
用带权二分小心输出-0
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