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Petrozavodsk Summer-2015. Ivan Smirnov Contest 1 B Bloom
時間 2021-01-06
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http://opentrains.snarknews.info/~ejudge/team.cgi?contest_id=001463 題目大意: 給出$n$個$x$,$m$個$y$,問有多少個hash函數 $y \equiv Ax + B (mod \ p)$, $p$是質數使得對$x$的集合加密後得到$y$的集合。 題解: 首先將所有$x$ mod $p$後去重。 剩下$n$個不同的$x$
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