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QOJ 更新日志 by Qingyu 2023-01-06 20:27:29
Petrozavodsk Summer 2021 Announcement by QOJ_News 2021-07-30 15:33:46
XXII Open Cup 新闻合集 / 比赛列表合集 by Qingyu 2021-09-02 23:08:35
XXI Open Cup 新闻合集 by Qingyu 2020-09-29 15:47:48
 
 
 
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#用戶名格言通過數
/Qingyu5089
1larryzhong682
2ZhaoZiLong321
3HuangHanSheng311
3MaMengQi311
5GuanYunchang309
6ZhangYiDe302
7hyddQingyu txdy! | Who will guard the guardians? | Solve more problems. | 警惕境外势力入侵qoj254
/flowersqytxdy!244
8Wu_Ren187
9repoman$$\prod_{i=0}^{n-1} (1+q^iz) = \sum_{i=0}^n q^{i(i-1)/2}\binom ni_q z^i$$174
10Lenstarorz Qingyu157
11Crysfly$$f(x)=(\sum_{i=0}^{n-1}\frac{y_i}{(x-q^i)\prod_{j\ne i}(q^i-q^j)})\prod_{i=0}^{n-1}(x-q^i)$$ 150
12Sa3tElSefr146
13qwq$\displaystyle \sum_{i=1}^n [i,i+1,\cdots, i+k] \pmod{10^9+7}$145
14feecle6418gyh ak ioi135
15YaoBIG126
16He_Ren118
17JohnAlfnovQingyu Kedavra ! 113
17zombie462<b>123</b>113
19alpha1022110
19not_so_organic今晚九点,QYC 唱歌。110