QOJ.ac

QOJ

Announcements
Upgrade of QOJ Judging Server by Qingyu 2025-06-02 15:48:38
若还想与我相见 by Qingyu + ucup-team001 2025-05-12 16:11:05
The 2nd Universal Cup Finals Analysis(草稿) by Qingyu 2025-03-03 16:39:06
QOJ Change logs (2025 Jun) by Qingyu 2023-01-06 20:27:29
Judging environment of QOJ (2025 updated) by Qingyu 2021-03-23 20:32:30
 
 
All the Announcements……

Top solved

#UsernameMottoSolved
1hos_lyric$$\left[\frac{x^n}{n!} q^{K-1}\right] \frac{(\mathrm{e}^{rx} - 1) (q + r + \mathrm{e}^{rx} + q \mathrm{e}^{rx} - r \mathrm{e}^{rx} + 1)}{(q + 1) (r - \mathrm{e}^{2rx} + r \mathrm{e}^{2rx} + 1)}$$1799
2xiaowuc1you're a half a world away, but in my mind I whisper every single word you say1765
3ucup-team47441189
4qiuzx1179
5ucup-team10051129
6ucup-team0041074
7maspyUniversal Cup Upsol部994
8larryzhong980
9CrysflyUOJ Round ~~缺投~~ 已倒闭 || www.cnblogs.com/Rainbowsjy919
10ucup-team087870

Top contributors

#UsernameMottoAuthored Problems
1bulijiojiodibuliduo127
2TsReaper120
3quailty108
4clrs97101
5Elegia$R(T_1\oplus T_2) < R(T_1) + R(T_2)$98
6zimpha69
7xiaowuc1you're a half a world away, but in my mind I whisper every single word you say60
8jiry_258
9ftiasch57
10nzhtl147754