Person in Charge

• cq_irritater
• 035966_L3

Attention

Important Problem Announcements

Make good use of the problem tags to locate problems.

It is recommended that you solve all trial problems (currently $15$ problems) before starting.

Sleeping Cup currently supports the following problem types: classic, objective, subjective, interactive, output-only, and communicative.

Unless otherwise stated, all original problems on this platform require file I/O.

Unless otherwise specified, every problem in Sleeping Cup contests uses subtasks and subtask dependencies.

Subtask $0$ in every problem is a sample that awards no points but is depended on by all other subtasks.

For all problem-related issues, please contact cq_irritater or 035966_L3.

For problems originating from Long Long OJ, also contact Murasame.

For problems related to CTFPC, also contact 2058_lunar_fall.

You may also report general issues here.

Feedback

Welcome to the Sleeping Cup feedback forum!

Simply submit your feedback as plain text; no special formatting is required.

When your submission status changes to Cancelled / Accepted, it means the administrators have read your feedback and will reply as soon as possible. Administrators periodically review submissions, so please do not rush them.

Do not post meaningless content. First-time offenders will receive a warning; repeat offenders will be banned.

For any issues related to Rating, please open an Issue in Sleeping Cup's Ratings first.

For any issues related to the test data of Sleeping Cup contest problems, please post in the discussion area of the corresponding problem first.

Certification

To certify your account, submit your Luogu UID on this problem.

Your submission must:

• contain the substring Certification;
• include your Luogu UID;
• be at least $200$ characters long (it is not limited that how you meet this request).

Place your Luogu UID in a prominent position.

To eliminate impostors, please complete certification via one of the following channels after submission.

Primary channel: Send the same text via Luogu private message to cirrationaler. You will usually receive a reply within 24 hours.

Backup channel: If the primary channel fails, submit the identical text here.

Email Unsubscription / Email Subscription

Submit the text Email Unsubscription to this problem to stop receiving system emails.

If you later change your mind, submit the text Email Subscription to resume receiving emails.

Delete Account

Submit the text Delete Account to this problem to request account deletion.

Once we receive your request, your account will be deactivated (banned) as soon as possible.

Deactivated accounts automatically stop receiving system emails.