Hello Codeforces!
mesanu and I are glad to invite you to Unofficial Div 4 Round #1. The round will not be rated for any participants since it is unofficial. Sadly, We can not post the contest on the Gym Section, so you can virtually participate in the contest by clicking this link:
https://codeforces.com/contestInvitation/d477e058f265a72092af5c11074234d720a0fb5f
You will be given five tasks and two hours to solve them.The problems were created and prepared by mesanu and SlavicG for users with a rating range from 0 to 1400 but anyone is welcome to participate in the round!
We would like to thank everyone who was involved in the round preparation:
- Brodicico, Grumpah, Sho for testing the problems and providing useful feedback.
- MikeMirzayanov for Polygon and Codeforces platforms.
Even though the contest is unrated we believe it is a really good way of practice, especially for Div 4 users. We tried our best to keep the statements short and clear and we hope you will like our problems!
UPD: You can participate whenever you want, just click the link above and virtually participate.
UPD2: Tutorial will be posted September 19 by mesanu.
UPD3: Editorial is out and contest is open for practice!
Congratulations to the winners:
When will it take place??
Whenever you want. Just click the link from the blog post, or here: https://codeforces.com/contestInvitation/d477e058f265a72092af5c11074234d720a0fb5f
and participate when you have time!
Auto comment: topic has been updated by mesanu (previous revision, new revision, compare).
How can you edit other people's blogs???
Why am I getting downvoted I asked a genuine question???
Whenever you create a blog entry you can add coauthors and only they and you can edit.
very nice contest
Nice problem D
Thank you!
Thanks for this nice contest ..D was more tricky than E for me.. Felt good to solve all problem for the first time (though virtual)....
D made easy for me when i saw the Ai limit..
Glad you had fun!
D had nothing to do with the elements' range.
There actually is a solution which has to do with the elements’ range :) We will explain both solutions on the editorial.
Great work SlavicG and mesanu,I enjoyed the problemset.
That's great news!
D was fun to solve. I saw a tougher version of E somewhere else, maybe in a previous CF contest.
E was inspired by a problem from EJOI named Fountain. The other problems were written by us.
Are you talking about this problem?
Problem
Yup, this one.
Lol there is nothing worse in debugging when you have taken the input incorrectly , that is what happened with me in E ,literally wasted like an hour searching where i did the mistake.
Really enjoyed the problem set especially problem D. Luckily, I solved all problems xD.
Glad you enjoyed the problems!
Why can't I participate again?
You will be able to participate again or just practice on the 19-th, after the editorial is published.
nice problem set for beginners. enjoyed solving D ;).
need more of these Unofficial rounds
We will try to do more of these rounds but it takes a lot of time to make these contests.
Nice round. You should propose Div. 4 round on Codeforces.
The limitation for B is wrong. I think that n should be <= 2 * 10^5
enjoyed solving. Thanks SlavicG mesanu :) solved A,B,C,E
Glad you liked the contest! Check out the editorial to see our solution for D.
Nice D, trivial E. i think E can not be so standard next time. Although it was a nice contest, great work! :D
Yay! finished 13th! ^v^ Nice problemset
E was easier than C, D. D was like a Atcoder style problem(So it was a cool one). Great contest overall. Need more like this.
Please Create more such Rounds.
A new one is coming soon ;)