posted @ 2020-11-27 21:25
Achtoria
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摘要:
利用期望的线性性,配合打表找规律
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posted @ 2020-11-27 20:56
Achtoria
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posted @ 2020-11-24 09:48
Achtoria
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posted @ 2020-11-24 09:09
Achtoria
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posted @ 2020-11-21 20:00
Achtoria
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posted @ 2020-11-21 19:58
Achtoria
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posted @ 2020-11-21 19:56
Achtoria
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posted @ 2020-11-21 19:54
Achtoria
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摘要:
计算倍数的方案数通过容斥求出恰好的方案数
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posted @ 2020-11-19 21:30
Achtoria
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posted @ 2020-11-19 21:12
Achtoria
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