QOJ.ac

QOJ

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qwq

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2544

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23

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Motto

\displaystyle \sum_{i=1}^n [i,i+1,\cdots, i+k] \pmod{10^9+7}

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Rating changes

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Accepted problems:198 problems

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Tried problems:31 problems

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Authored Problems:0 problem

None

Virtual Participations:16 contests