Hello, Codeforces!
The 2019-2020 ICPC Asia Hong Kong Regional Contest has ended on December 1. Due to the damage caused by recent social movements in the city to the campus of the City University of Hong Kong, where the contest was originally planned to be hosted, it was decided by the RCD to hold the contest in Shenzhen, China instead. The problems for this contest were mostly prepared by retired ICPC participants of Zhejiang University, and I was the coordinator of the problem-setting group.
We are glad to announce that we have published the 2019-2020 ICPC Asia Hong Kong Regional Contest in Codeforces::Gym for you to practice. Feel free to start virtual participation or to solve the problem individually. For virtual participation, the contest is 5 hours in length and follows usual ICPC rules. Team participation is recommended, but it is also possible to participate individually.
My thanks go to:
Volunteers and staff from Northeast Forestry University for holding a very successful onsite contest.
Problem authors: lsmll, quailty, Claris, jiangshibiao, shb123 and reku.
Testers: izban, 300iq, and many members of the competitive programming team of Zhejiang University, some of them are: Todobe, wxx_louisa, zx2017, SoSad, zhangqingqi and lyk248289469.
MikeMirzayanov for the powerful Polygon and Codeforces system.
The CCPC Committee and the sponsors of the onsite contest.
We kindly ask everyone who has already know the problems not to participate or discuss them before the mirror contest has ended. Hope you enjoy the problems!
UPD: Contest has ended, thanks everyone for your participation. Here is the link to the official editorial, unfortunately it is in Chinese. But feel free to ask in the comments if you have any questions about the problems.
