Universal Cup Judging System
Universal Cup
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用戶檔案
qwq ♀
Rating
2544
Contribution
19
用戶組
Default
格言
$\displaystyle \sum_{i=1}^n [i,i+1,\cdots, i+k] \pmod{10^9+7}$
Rating 變化
已解決的問題：共 195 道題
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嘗試過的問題：共 34 道題
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