In the absence of a scheduled official CodeForces round, I'd like to invite you to train tomorrow (on SATURDAY — sorry, this mistakenly said Sunday earlier) with the Polish teams on the ICPC-training camp in Spała.
The contest is now visible on the CodeForces Gyms, where it will be conducted. Direct link: Spala training camp, Wroclaw contest
It's a 5-hour team contest (of course you may start individually). The starting time is 11AM Moscow Time (sorry for the late notice). You can also participate virtually afterwards.
Problems have been collected from various sources by our two teams from the University of Wrocław, Poland. They are not new/original but we believe it's unlikely for you to have had seen many of them before.
Be advised that the contest start time might get pushed back 5-10 minutes due to unforeseen onsite circumstances.
I'd also like to thank MikeMirzayanov for the excellent CodeForces and Polygon systems. Lest someone diss me in the first comment for not doing so ;)
Will submissions be made public?
I don't think Gym submissions are made public after the contest.
For problem J, It seems I wasn't the only one to get wrong answer on test 7 and test 9. Anyone know the edge case?
Spoiler alert
Sometimes, there is no optimal solution where at most two tickets intersect at any given time.
I don't understand :X
It's your problem mannn...))))) Go away from codeforces.com and don't come back no more. NOOOOOOOB!!!!!!
no bully. anyone had been noob before.