910 Sounds good! :)

As a tester,the problemset is breath-taking!Hope you enjoy the round :)

As a tester, I recommend you to participate, I had fun testing the round and hope you'll also enjoy it!

NemanjaSo2005 orz

As a tester, I enjoyed the round. Nice that my friends did 2 rounds in a short amount of time (900 was also by my friends). Maybe I should join them?

this round is clashing with world cup final

What is the score distribution among the problems?

As a tester, I recommend you to participate, I had fun testing the round and hope you'll also enjoy it!
PS.911 Round is coming！

hope i could calm down and focus on the problems

Good luck everyone.

As a tester, you know what I did

Hope to get green after that one

How can I change utc in codeforces?

Am very excited for this round.

expecting very less Indian participants

As a first-time problem setter, I hope you enjoy the problems and orz to all testers and participants!

Excited to reach cyan after this round!

I feel like Kapil Sharma in “Kis Kisko Pyaar Karoon”, as I have to juggle between a Codeforces contest, a cricket world cup final, and an end semester exam. Still trying to find my fourth one.

Life got no chill!!

contest cancel karaao

Happy Men's Day :)

Scoring distribution when?

Sunday rounds are best!!!

n0sk1ll Could you remind me the name of that legendary game on your profile picture?

hope to reach cyan today

Dammnnnn score distribution :⁠-⁠!

Interesting score distribution. C = D = 1750. Hope not to lose CM)

GL everyone!

I will win Codeforces Round #910!

I hope this game goes well

are codeforces mirrors down? m3.codeforces.com? dont seem to be working

Participation is less due to ICC CWC Final

ummm.. who else sacrificed this round to watch the ICC world Finals... xD.

The authors of this wonderful round, I really hope that you will never do such cool tasks again

completely unbalanced round, all there is to say.

why it gives wrong answer on test 3 ?? ~~~~~ int n; cin >> n ; vector < int > arr ( n + 1 ) ; for ( int i = 1 ; i <= n; i++ ){ cin >> arr[i] ; }

int ans = 0 ; 
 int last = arr[n] ; 
 for ( int i = n - 1 ; i >= 1 ; i-- ){ 
     if ( arr[i] <= last ) {
        last = arr[i] ; 
        continue ; 
     }


     int cnt = 0 ; 
      while ( true ) {
         int left = arr[i] / 2 , right = ( arr[i] + 1 ) / 2 ; 



         if ( right <= last  ){
            last = left;
             cnt++;
             ans += ( 1 << cnt ) - 1;
            break;
         }


         arr[i] = ( arr[i] + 1 ) / 2;
         cnt++;

     }


 }

 cout << ans  ;

~~~~~

Not good problem $$$C$$$. Solve in $$$3$$$ min, but debugging output format $$$30$$$ minutes:) $$$ABDE$$$ are cool, thanks!

Please, either get better at balancing problems or don't host contests at all. This is the 2nd time this has happened.

Solved DE but failed to solve BC....

Wow, problems are actually incredible bad)

Why so unqualified testers? That's the questing...

A: Ok problem. And the last one tbh.

B: It's just unfathomable hard. Some observation maybe or just random greedy solution, as far as i can see... Didn't get it.

C: Statement is barely readable. Why are we coloring edges??? It is just too hard to visualize. It would be much more interesting if we were coloring cells and not the edges.

Other problems: Didn't even read due to unfathomable B and C.

cringe

My worst round ever:( Spent all the time debugging.

Is it just me or has the problem B already occurred somewhere in this exact form?

it was really bad

spending all the time trying to debug :(

I'm confident that i've seen problem B and D within the last six months in some codeforces contest.

Good bye hopes of getting cyan

div2 with div1 problems

we need more competitions from the person with the color blue. cringe

Should have just named problem C Good colorings to add it to the collection of annoying coloring problems.

Also I think E shouldn't be worth 2000 points, one observation is enough to solve the problem on the spot.

thanks bro now i finally reached cyan

Messed up this contest so bad lmao

Problems themselves are very good(especially I like this kind of B,C,D,E), and score distribution is also good. But only hard D2B destroyed the experience for many contestants... This kind of downvote is so sad...

When my internet goes down right before the contest that's a sign XD

B is same as https://leetcode.com/problems/minimum-replacements-to-sort-the-array/description/ D is almost same as https://codeforces.com/contest/1513/problem/F how?

why this is wrong for the first test case in problem C ?

YES
R B R B 
B R B R 
R B R B 
B R B R 
R R B R B 
B B R B R 
R R B R B .

A very unbalanced contest

MAKE THIS ROUND UNRATED MikeMirzayanov

the same problem as problem B -> https://leetcode.com/problems/minimumreplacements-to-sort-the-array/description/

almost the same problem as problem D -> https://codeforces.com/contest/1513/problem/F

We can understand if only one problem is the same as some problems from the past, but having two is not fair. I'm also certain that problem C was a copy of some problem from the past.

UPD: https://codeforces.com/problemset/problem/1603/C one more proof, thanks Golovanov399

Ya'll are mad that similar problems have appeared before, yet D was solved by less than 1k official participants during the contest, and B was solved by less than 3k participants (this is D2B we are talking about that usually gets solved by over 5 thousands of people).

Either get better at problem solving or get better at googling problems.

The link of old D question https://codeforces.com/contest/1513/problem/F, but only there minimum,in this contest maximum

Finally reach cyan :)

Can anyone help me debug this Solution for A ?

Man. Problem B turned out to be so easy, but I wasted all my time debugging solution for C.

I'm not really a fan of F, it took me ~10 mins to get the solution and ~45 mins to code it. The idea is sort of nice but the lengthy implementation sort of kills it. (Disclaimer — tbf this might be due to my trash implementation skills).

what a bad contest

Amazing I had +102 in this round

I forgot about this round, thanks to the cricket worldcup final.

India lost, round misses double pain!

Ngl, I've solved that similar to B leetcode problem before and I had the advantage of recalling an approach from https://leetcode.com/problems/maximum-of-absolute-value-expression/ similar to D. Feels like I didn't deserve purple from this round.

Problem D looks familiar with a Problem before,but i forget what is it infact,both two problems are analyzed by segment and calculate the contribution but i forget what problem is that=<

"Note that "1 A" and "3 A" are also correct one-operation solutions."--- Thanks for adding this line in 1st problem statements. I was confused first. It's make the Question clear. Without this line the problem is hard. But, after adding this line the problem became very easy.

Absolutely two (1, 2) equal problems on codeforces. What happened to this platform?

https://leetcode.com/problems/minimum-replacements-to-sort-the-array/ Problem B is found on leetcode. This is unfair !

Problems were pretty nice, but C sucked (that's just my bias though because it was hard for me haha)

LOL, I straight up copied my solution for B from leetcode. Zero code changes required. Not sure how was it not flagged out during testing, it was a relatively recent problem.

When we have solution? :))

I'm on the list!

Good luck everyone!

fking bfs

Thanks for the round! problem E was quite interesting, and DF are kind of standard-ish but it is still good enough :)

I solved problem E immediately after the contest. I realy dissapoint about it. I could get about 69 rating, but i get only 2. But contest was really nice. Problem C and D is very interesting, and problem E fits it's position very well. Thanks to @n0sk1ll and @ELDRVD for this time spent.

how can someone with higher initial rating and lower contest ranking than me get more plus rating points than me??