QOJ.ac

QOJ

公告
The 2nd Universal Cup Finals Analysis(草稿) by Qingyu 2025-03-03 16:39:06
IOI 2025 China Team Selection Statistics & Prediction by Qingyu by Qingyu 2024-12-04 15:22:03
QOJ Change logs (2025 Mar) by Qingyu 2023-01-06 20:27:29
Judging environment of QOJ (2025 updated) by Qingyu 2021-03-23 20:32:30
 
 
 
所有公告……

Top solved

#用户名格言通过数
1hos_lyric$$\left[\frac{x^n}{n!} q^{K-1}\right] \frac{(\mathrm{e}^{rx} - 1) (q + r + \mathrm{e}^{rx} + q \mathrm{e}^{rx} - r \mathrm{e}^{rx} + 1)}{(q + 1) (r - \mathrm{e}^{2rx} + r \mathrm{e}^{2rx} + 1)}$$1642
2xiaowuc1you're a half a world away, but in my mind I whisper every single word you say1582
3ucup-team1005Natsuhi Kage (Qiyu Feng, Jianing Liu, Zemu Zhu) Solved: 769; Last Solved at 2025-04-19 15:23:20 $\color{orange}{(39\text{ hours ago})}$ Please DM ucup-team4744 with "夏日影加训!!!"1129
4qiuzx1084
5maspyUniversal Cup Upsol部992
6larryzhong981
7ucup-team004887
8Crysfly$\huge\text{UOJ Round 缺投}$ || www.cnblogs.com/Rainbowsjy849
9PetroTarnavskyiWhy haven't you registered at https://algotester.com/en yet? 🤨806
10ucup-team087794

Top contributors

#用户名格言Authored Problems
1quailty106
2clrs9784
3TsReaper80
4bulijiojiodibuliduo79
5xiaowuc1you're a half a world away, but in my mind I whisper every single word you say60
6ftiasch46
7Elegia$R(T_1\oplus T_2) < R(T_1) + R(T_2)$43
7QingyuTake me on a trip, I'd like to go some day43
9zimpha42
10tangjz39