AbdulHaleem_Osama's blog

Can anyone tell me what is happenning!!!!! +ve delta RIP
By AbdulHaleem_Osama, history, 2 years ago, In English

I was pupil a couple of hours ago. Also, my friend was expert.

Now, I am newbie and he is specialist. What is happening?!!!!!!!!!!!!!!!!!!!

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2 years ago, hide # |
 
Vote: I like it +4 Vote: I do not like it

My rating also decreased for 9 points for some reason

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2 years ago, hide # |
 
Vote: I like it +3 Vote: I do not like it

one plausible way that I find is,

People below ur ranking cheated and they were regarded as disqualified from the contest, as a result total number of participants declined and thus, ur overall performance and rating both worsened (Ranking 5th among 1200 people is better than ranking 5th among 800 people)

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    2 years ago, hide # ^ |
     
    Vote: I like it +3 Vote: I do not like it

    I don't think it's the case: after plag check I got -68 in CodeTon8, though previously I got -60. I checked and found out that only 70 people were skipped. Besides that, my place also improved. I don't think that 70 cheaters out of 11000+ people could affect rating that bad.

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    2 years ago, hide # ^ |
     
    Vote: I like it +2 Vote: I do not like it

    It is plausible if the delta was decreased by max of 5 points. But 34 is INSANE!

    It looks as if " half of the participants were cheating ". Of course that's an extreme case and it is not possible in normal conditions.

    Also, if we assumed that that half of participants were cheating, the last div4 before the last one had nearly the same conditions. So, why this didn't happen at the time of roll back then.

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      2 years ago, hide # ^ |
       
      Vote: I like it 0 Vote: I do not like it

      I think the reason for this is simple, i think by mistake, the rating for those who had cheated in the contest had not been deducted but there contest that was to not to be considered got deleted, this created a gap which caused all of ours rating changes i suppose... I have seen 3 people who got their rating increase despite being caught in the plag check, i think the ratings would be reverted back in a few time

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2 years ago, hide # |
← Rev. 2  
Vote: I like it +5 Vote: I do not like it

It's written just on top of the site...

Rating changes for last rounds are temporarily rolled back. They will be returned soon.

The reason of this is that system need to recalculate the rating for some reason (as the simplest one — removing cheaters). Everything will be returned soon (for someone maybe with small difference)

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    2 years ago, hide # ^ |
     
    Vote: I like it +6 Vote: I do not like it

    In my experience every time it happens, delta increases by +1 or a little above. But, this is the first time to decrease. Not by -1 (I wished). It decreased (for me) by -34 points!

    Also, for my expert friend (previously hh), it is his first time to encounter something like that.

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2 years ago, hide # |
 
Vote: I like it +5 Vote: I do not like it

My rating decreased by around 20 points. This is the first time rating got decreased during temporary roll back; it used to increase by 1 point before. Got something to do with last DIV 4 contest I believe.

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    2 years ago, hide # ^ |
     
    Vote: I like it 0 Vote: I do not like it

    My rating also decreased by 10 points from previous rating. I don't know if there is some change in how they calculate change in ratings as negative delta in one of my contest became more and positive delta went down. Both contests I gave were div 2

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2 years ago, hide # |
 
Vote: I like it 0 Vote: I do not like it

My rating has also decreased by 34 points. Apart from that a friend of mine who was newbie is now specialist. This is strange.

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2 years ago, hide # |
 
Vote: I like it -14 Vote: I do not like it

Codeforces is tough.

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2 years ago, hide # |
← Rev. 2  
Vote: I like it +3 Vote: I do not like it

I'm a 1409 rate pupil :/

UPD: fixed!

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2 years ago, hide # |
 
Vote: I like it 0 Vote: I do not like it

I dont know why my rating add 200. 1301->1511???

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2 years ago, hide # |
 
Vote: I like it 0 Vote: I do not like it

My rating increased a lot for some reason

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2 years ago, hide # |
 
Vote: I like it +20 Vote: I do not like it

During the last recalculation, an issue occurred. We are working on identifying the cause and fixing it.

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2 years ago, hide # |
 
Vote: I like it 0 Vote: I do not like it

It is mentioned that " Rating changes for last rounds are temporarily rolled back. They will be returned soon."

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