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Give a set S, |S| = n, then how many ordered set group (S1, S2, ..., Sk) satisfies S1 ∩ S2 ∩ ... ∩ Sk = ∅. (Si is a subset of S, (1 <= i <= k)) Input 阅读全文
posted @ 2016-05-06 21:52
sCjTyC
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Sky Code Time Limit: 1000MS Memory Limit: 65536K Total Submissions: 2085 Accepted: 665 Description Stancu likes space travels but he is a poor softwar 阅读全文
posted @ 2016-05-06 20:30
sCjTyC
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Happy 2006 Time Limit: 3000MS Memory Limit: 65536K Total Submissions: 10856 Accepted: 3776 Description Two positive integers are said to be relatively 阅读全文
posted @ 2016-05-06 15:07
sCjTyC
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