Hello, Codeforces community!
I'm glad to invite you to Criterion 2021 Round 8 which will be held on January 15, 2021 at 15:00 PM +0600 and will run for 2 hours 30 minutes.
The contest will take place at Toph.co
This contest is rated for all participants. You can register for the contest here.
Problems of this contest were prepared and tested by upobir, jAckAL_1586, Hasinur_, ishtupeed, TarifEzaz and me.
Thanks to TarifEzaz for his unconditional support and hjr265 for the best contest programming platform in Bangladesh.
We're inviting you all to participate in this contest. Hope you will enjoy the problem set.
There will be an editorial for this contest shortly after the round ends.
Feel free to share your experience with previous Criterion Rounds!
Contest Link: Criterion 2021 Round 8
Happy Coding!
Auto comment: topic has been updated by Peregrine_Falcon (previous revision, new revision, compare).
Contest time of Toph Criterion has been rescheduled to January 15,3:00PM +0600
Last night before going to sleep I saw the schedule was today's morning 10:20..Despite having some important work I managed some time for the contest and now before 10 minutes of the contest you are saying that it is rescheduled? This is clearly nonprofessional.
We are extremely sorry for the inconvenience. We shall take care of the situation from now on. Thank you for your response.
Unbalanced problem difficulty :|
You can check the problem sets of previous rounds.
$$$A, C$$$ and $$$E$$$ are pretty standard problems.
$$$D$$$ can be easily solved if you generate the first few values and search on oeis. Here is the sequence: smash me
$$$B$$$ is cool. How to solve it?
https://toph.co/p/create-some-walls/editorial