Hello, Codeforces!

We are euphoric to invite you to Soy Cup #2: Vivian, which will take place on 01.06.2025 15:05 (Московское время).

You will have $$$5$$$ hours to solve $$$13$$$ problems, including at least one interactive problem.

This is a team contest following ACM/ICPC rules, with teams of up to $$$3$$$ members. The penalty for an incorrect submission is 20 minutes.

The standings will be frozen for the last 60 minutes of the contest. The final results and editorial will be streamed live on Bilibili on June 2, 2025, at 06:00 UTC.

All problems are created and prepared by me.

We would like to thank:

1. MikeMirzayanov for creating the fantastic CodeForces and Polygon platform.
2. torif for sponsoring the round.
3. SATSKY_2025target_LGM, Tobo, AkaiLemon, Maxduan, SudoXue, rewhile, and baka_killer_uuz for testing the round and giving useful feedback.
4. macaquedev for refining statements.
5. The groupmates from bookcat Fan Club and cry's basement for allowing me to postpone my crossdressing to March infinity.
6. pop and Beaten for preparing and urging my cosplay.
7. You for participating in the round!

Registration

Because the round is not public as we want to do scrollboard, you need to fill this sheet to register the round. If you live in China and have a WeChat account, you can participate officially to have a chance of getting prizes. As an alternate, you can also fill this sheet which is in Chinese to participate officially.

Prizes

Our awards for official teams are divided into two categories:

First to Solve Awards

A prize will be awarded to the first team that solves each problem. The 13 problems are grouped into four tiers based on their factual difficulty (first by accepted teams, then by total penalties):

• Tier 1 (3 problems): 20 RMB for the first solve on each of these problems.
• Tier 2 (3 problems): 10 RMB for the first solve on each of these problems.
• Tier 3 (3 problems): 5 RMB for the first solve on each of these problems.
• Tier 4 (4 problems): 2 RMB for the first solve on each of these problems.

Final Ranking Awards

These awards are based on the final leaderboard standings.

• Top-3: The champion, runner-up, and 3rd place teams will be awarded 50, 30, and 20 RMB respectively.
• Gold Award: Top max(6, 10% of eligible teams) will be awarded 10 RMB.
• Silver Award: The next max(9, 15% of eligible teams) will be awarded 5 RMB.
• Bronze Award: The next max(12, 20% of eligible teams) will be awarded 2 RMB.

Please Note:

• A team is eligible if and only if it is official and has a submission during the round.
• When calculating the percentage of eligible teams, the result is rounded up. For example, if there are 61 eligible teams, the Bronze Award will be awarded to 13 teams.
• Teams winning a Top-3 award are also considered Gold Award winners but will not receive the monetary prize for both.
• In addition, all prized teams will also receive plaques as memorials.

Good luck and have fun!

Vivian from Zenless Zone Zero, after whom our round is named

UPD: All of the registrants are now invited to Soy Cup #2 Warmup, which will start on 31.05.2025 14:05 (Московское время). Please confirm you have access to the warmup contest by then! The problems of the warmup round make no sense and have no relation to the round tomorrow.

UPD2: The registration will be closed by June 1, 2025, at 11:30 UTC. Please register as soon as possible if you'd like to participate.

UPD3: All participants should be notified that you are now accessible to the contest now. If you don't receive the message, please contact me asap.