We invite you to participate in CodeChef’s Starters 100, this Wednesday, 13th September, rated for all users.
Time: 8:00 PM — 10:00 PM IST
Note that the duration is 2 hours. Read about the recent judge migration here.
Joining us on the problem setting panel are:
Setters: Kanhaiya notsoloud1 Mohan, Satyam satyam343, Takuki tabr Kurokawa, wuhudsm, NaOH_Frog, Yan yan.silva Silva
Testers: Takuki tabr Kurokawa
Statement Verifier: Kanhaiya notsoloud1 Mohan
Video Editorialists: Madhav jhamadhav Jha, Suraj jhasuraj01 Jha, Jwala jwalapc, Adhish ak2006 Kancharla, Pravin pravin_as Shankhapal
Text Editorialists: Nishank IceKnight1093 Suresh
Contest Admin: Satyam satyam343
Written editorials will be available for all on discuss.codechef.com. Pro users can find the editorials directly on the problem pages after the contest. The video editorials of the problems will be available only to Pro users.
Also, if you have some original and engaging problem ideas, and you’re interested in them being used in CodeChef's contests, you can share them here.
Hope to see you participating.
Good Luck!
Finally back after two months.Excited.
satyam343 supremacy!
omg pravin_as's video editorials :)
Unable to log in with Gmail.
Long submission queue!
ConstructiveChef :(
why is this wrong , div 2 A (stamps 100) Can someone please give a case for which it fails?
Correct answer is 010000
thank you
counter case: 4 1001
ans: 1000
Thank you
Any one who did concussive sequence?
Yes
any test cases ? for what this is failing https://ideone.com/WzvdMT
Check for
t = 1
n = 4
array = [1 ,3 ,3 ,5]
Possible answer can be :- [3, 1, 5, 3]
Thanks .i was just blindly was coding and doing .i am a idiot .just heuristics are never sufficient.
Rank updating too slowly :|
When will the leaderboard update? It hasn't for nearly 70 minutes. :/
Edit: It's updating, but very slowly.
It's high time to learn System Design for Codechef team :[
While I enjoyed the problems, I'm disappointed to see that the contest platform is less functional than I remember. (For example, the scoreboard in Div. 1 didn't update for the last hour of the contest, the contest timers on the problem pages were off by several minutes so that I didn't realize the contest was over until two minutes after it had ended, etc.)
Horrible constructive problemset, bad queue issues, and ranklist is stuck
can anybody pls explain me why [2 2 2 2 2 1 1 1 1] this test case is giving -1 for concussive sequence its answer should be 2 1 2 1 2 1 2 1 2 but for someone's code it is giving -1 and that is accepted solution I don't know what am I missing
Same for me.
Hey all,
We’re sorry there were some major inconveniences for the participants. Submitting code to the problems had been working fine throughout, but other peripheral stuff (Run, ranklist, live ratings, etc) were getting backlogged, and for a bit the pages were also slow to load. The new judging system worked smoothly, but we seem to have underestimated the increased impact it’ll have on the DB, and so the DB got overloaded. We will positively fix the DB issue in a few days and post an RCA.
Apologies again, for the issues.
It also passes incorrect solutions as mentioned below — Link
another one https://www.codechef.com/viewsolution/1020510012 and there will be more for sure
What have they done to codechef Have they improved it or downgraded it
downgraded
For concussive sequence,my code gives WA.When i debug,it gives me following testcase and says output is wrong-
and my code output is 1 2 1 2. How is that wrong?? link to submission- link
I guess this question has a bug for the testcase 2 2 2 2 2 1 1 1 1 the correct submissions answer is -1 but according to question it should be 2 1 2 1 2 1 2 1 2 they have to clarify this or consider this bug !
My solution outputs the same and got accepted maybe there is a bug in your implementation submission
correct submission link which is giving -1 on this test case https://www.codechef.com/viewsolution/1020510882
Then this AC solution is wrong and the test cases are poorly written. Also your code might be failing on some other test case then.
https://i.ibb.co/7CN6pvd/Screenshot-17.png why this test case is wrong submission link https://www.codechef.com/viewsolution/1020528406
As CodeChef_admin said in the comment below debug wa feature doesn't work for that problem so your code could be failing in some other test cases. Link
maybe but some submissions which are giving -1 for 2 2 2 2 2 1 1 1 1 are also accepted ?? how can we expect to get fair checking for all submissions for example https://www.codechef.com/viewsolution/1020510882
Maybe that's why people don't like codechef anymore
It's giving 1 2 1 2
I guess it points you to a wrong testcase, because my submission didn't output -1, and it is accepted. So, perhaps there is some other case where your code fails.
No rank and score updates, long queues, constructive problems in div2 and also didn't understood why my code works fine for Ant and passes all test cases but it just does.