Goodbye, Jiachen!

We will host the Goodbye Jiachen contest! The contest contains $$$5$$$ problems to be solved in $$$5$$$ hours.

The year 2024 marks the end of the Chinese lunar Jiachen Dragon Year, with Lunar New Year's Eve symbolizing its conclusion. The upcoming year will be the Yisi Snake Year, where the snake represents wisdom and the cycle of rebirth.

As time passes, UOJ continues to embrace new milestones. From Goodbye Jiawu to Goodbye Jiachen, we have witnessed UOJ's growth and changes over the past decade.

This contest will take you into the world of Poker Kingdom. You will face challenges alongside five poker card characters, writing your own chapter of victory.

• Contest link: https://uoj.ac/contest/93
• Start Time: https://www.timeanddate.com/worldclock/fixedtime.html?iso=20250127T1300&p1=33&ah=5
• Writers: Gellyfish, miao22, Melania
• Testers: orzdevinwang, emptyhope, registeretsiger, yaoxi
• Duration: 5 hours
• Difficulty: like CF Div.1 contests (maybe slightly harder)
• The point values: 100-100-100-100-100

The contest will follow the IOI-style rules: Each problem can be submitted up to 50 times, and scores can be viewed in real-time. All the problems will have subtasks, the final score will be based on the highest-scoring submission.

We are looking forward to your participation!

Q&A

Q1: What can I do if I can't understand Chinese?

You can change the website to English at the bottom of the website.

We don't have English statements for problems now, sorry! But ChatGPT may be helpful for translation.