Hi!
The next stage of Universal Cup, Run Twice Contest, will happen on December 30-31, 2023. As the name suggests, all problems in the contest are in run-twice format. I am the author of the contest.
Originally, the contest was held in Petrozavodsk Summer Camp 2022. The plan was to hold it later as an Opencup stage, in order to further introduce the format to a wider audience. Alas, Opencup got suspended around that time. Fortunately, sharing it beyond the camp can finally happen now. Thanks go to Qingyu and the other Universal Cup admins!