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918IdealizedRomance$f_t=\sum\limits_{i=0}^{n-1}{n\choose i}(-1)^{n-1-i}\frac{i^{t-1}(n-i)}{n^t}$29
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952_set_std::set<std::pair<oj,username> >sjy;28
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952csy2005$1>0$28
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952KevinLikesCoding$\pi(n)=dp_{n,\pi(n^\frac{1}{3})}-\pi(n^\frac{1}{3})+1 -\sum_{p\in (n^\frac{1}{3},n^\frac{1}{2}]} \pi(\frac{n}{p})-\pi(p)+1$28
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979piaoyunAll I know,all I know,love will save the day27
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