# QOJ

Announcements

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

All the Announcements……

### Top solved

#UsernameMottoSolved
1xiaowuc1you're a half a world away, but in my mind I whisper every single word you say1305
2hos_lyric$$\left[\frac{x^n}{n!} q^{K-1}\right] \frac{(\mathrm{e}^{rx} - 1) (q + r + \mathrm{e}^{rx} + q \mathrm{e}^{rx} - r \mathrm{e}^{rx} + 1)}{(q + 1) (r - \mathrm{e}^{2rx} + r \mathrm{e}^{2rx} + 1)}$$1133
3ucup-team1005大家好，我是 C++ 高手，今天来点大家想看的东西。\begin{aligned} &\texttt{sort(Ring.begin(), Ring.end());} \\ &\texttt{sort(Chain.begin(), Chain.begin(), [](int x, int y) \{return x > y;\});} \end{aligned}1024
4larryzhong983
5PetroTarnavskyiWhy haven't you registered at https://algotester.com/en yet? 🤨798
6PhantomThreshold668
7zhouhuanyi649
8Crysfly我还能为你驻足到何时642
9ckiseki卷不动了608
10ucup-team2335563

### Top contributors

#UsernameMottoAuthored Problems
1TsReaper41
2ftiasch35
3zimpha34
4Qingyu一如此刻，十指紧握29
5Itst24
6bulijiojiodibuliduo22
7quailty21
8clrs9720
9Kubic14
10Elegia$\mathbf{PER} \in \mathbf{DTIME}_{\mathsf{RAM}}[2^{n - \Omega(\sqrt n)}]$12