We will hold Luogu Round 221 on Luogu. This is a Div.3 Round. English statement will be provided officially.

• Contest URL: https://www.luogu.com.cn/contest/224129
• Start Time: 04.19 14:00(UTC+8)
• Duration: 210 minutes
• System: IOI
• Difficulty: CSP-J (see this blog), easier than Codeforces Div.3.
• Staffs: future_zyl, FFTotoro, Chx_
• Rated range: <=1600 rating on Luogu
• Score Distribution: 100-100-100-100

We are looking forward to your participation!

• A tutorial on using Luogu(Please note that #pragma GCC optimize is temporarily banned for some reason on Luogu.)
• A brief introduction to Chinese NOI