Hello all! I'm pleased to announce the 19th stage of the 2nd Universal Cup. It will be held from January 20 to January 21. You can choose between one of seven possible time windows.

Problems were authored by me (-is-this-fft-) and SLLN. I would also like to thank Andres_Alumets, marko312, sandra.schumann426 and nor for valuable discussion, as well as all of the Universal Cup staff for hosting the contest.

This contest was originally used in the Osijek Competitive Programming Camp Fall 2023. If you participated, please refrain from participating in this stage of the Universal Cup.

About Universal Cup

Universal Cup is a non-profit organization dedicated to providing trainings for competitive programming teams. Up to now, there are more than 700 teams from all over the world registering for Universal Cup.

• A more detailed introduction: https://codeforces.com/blog/entry/118679
• Register a new team: https://ucup.ac/register (the registration request will be processed before each stage)
• Results of past stages: https://ucup.ac/results
• Terms: https://ucup.ac/terms
• Ratings: https://ucup.ac/rating

If you liked this contest and want more like this, come to the next Osijek camp! Registration is now open. If you hated this contest and never want to see anything like this ever again, still come to Osijek and we'll try to make contests that are less like this one.