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IdealizedRomance
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1800
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0
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Motto
$f_t=\sum\limits_{i=0}^{n-1}{n\choose i}(-1)^{n-1-i}\frac{i^{t-1}(n-i)}{n^t}$
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NoneVirtual Participations：1 contest
| Name | Start time |
|---|---|
| Public NOIP Round #1 (Div. 1, 提高) | 2022-10-26 07:54:52 |