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QOJ

Announcements
IOI 2025 China Team Selection Statistics & Prediction by Qingyu new by Qingyu 2024-12-04 15:22:03
现在用户主页会显示 List of Authored Problems by Qingyu 2024-09-13 17:06:25
IOI 2024 如何呼唤你的名字 by Qingyu 2024-08-24 20:53:40
QOJ 常见问题(2024 updated, Q&A) by Qingyu 2023-03-23 22:14:28
QOJ 更新日志(2024 Aug) by Qingyu 2023-01-06 20:27:29
 
 
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Top solved

#UsernameMottoSolved
1hos_lyric$$\left[\frac{x^n}{n!} q^{K-1}\right] \frac{(\mathrm{e}^{rx} - 1) (q + r + \mathrm{e}^{rx} + q \mathrm{e}^{rx} - r \mathrm{e}^{rx} + 1)}{(q + 1) (r - \mathrm{e}^{2rx} + r \mathrm{e}^{2rx} + 1)}$$1398
2xiaowuc1you're a half a world away, but in my mind I whisper every single word you say1317
3ucup-team1005沉舟侧畔千帆过1053
4maspyUniversal Cup Upsol部990
5larryzhong983
6qiuzx816
7PetroTarnavskyiWhy haven't you registered at https://algotester.com/en yet? 🤨806
8Crysfly我还能为你驻足到何时744
9zhouhuanyi743
10ucup-team004710

Top contributors

#UsernameMottoAuthored Problems
1quailty98
2clrs9782
3TsReaper74
4bulijiojiodibuliduo69
5ftiasch46
6zimpha42
7tangjz39
8Qingyu一如此刻,十指紧握38
9Elegia$R(T_1\oplus T_2) < R(T_1) + R(T_2)$37
10AHdoc30