We will hold 【MX-X13/J16】Mengxiong Weekly (Open) on Luogu. This is a Div.1+Div.3 round provided by our collaborator. English statement will be provided by DeepSeek V3. You can switch the language of the problem description.

- Contest URL:
- Start Time: 06-29 14:00 (GMT+8)
- Duration: 180 minutes
- System: IOI
- Difficulty: Div.1+Div.3
- Staffs: sszcdjr, Otomachi_Una, rizynvu, SesameSoupO, _istil, StarSilk
- Rated range: Unrated on Luogu
- Score Distribution:
- Div.1: 100-100-100-100-100
- Div.3: 100-100-100-100-100
- The Div.3C will be Div.1A, Div.3D will be Div.1B, etc.
We are looking forward to your participation!
- A tutorial on using Luogu (Please note that
#pragma GCC optimizeis temporarily banned for some reason on Luogu.) - A brief introduction to Chinese NOI









I received a direct message on Luogu saying that I won a prize in this contest, but I'm unable to reply because my account is not verified (Username: Rubikun). Also, I’m not living in China—would it still be possible to have the prize sent to me? I live in Japan.
Thank you very much for participating in our contest. Our staff member (Codeforces id: PinkieRabbit) will contact you via private message on Codeforces to discuss the details regarding your prize. If shipping is required, Luogu administrator, kkksc03, is currently in Japan and may be able to help us send the prize to you.