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As a traditional event in the past years, join the IOI 2026 Prediction Game!
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#11454: Luzhuoyuan
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#11454: Mario
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$$\oint_{w=0}\frac{dw}{2\pi i}\frac{1}{f(w)-z}=\sum_{n=0}^\infty\frac{z^n}{n!}\left.\frac{d^n}{dw^n}\left(\frac{w}{f(w)}\right)^{n+1}\right|_{w=0}$$
#11454: mateberishvili
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#11454: MayaZayn
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欢迎大家关注泠鸢yousa（ || 大蛇小超手123啊
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