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#355: LH
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$$|X/G| = \frac{1}{|G|}\sum_{g \in G}|X^g|$$
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每一个不曾起舞的日子，都是对生命的辜负。
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没有终点线。 只有为了达到那个目标所需的战斗。我们永远不会停止竞速，因为我们的追求的永远更好是永无止境的。
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