Utkarsh.25dec's blog

By Utkarsh.25dec, history, 3 months ago, In English

We invite you to participate in CodeChef’s Starters 10 this Sunday, 29th August, rated for both division 2 & 3 participants.

Time: 4 PM — 7 PM IST.

Joining me on the problem setting panel are:

The video editorials of the problems will be available on our YouTube channel as soon as the contest ends. Subscribe to get notifications about our new editorials.

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!

 
 
 
 
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3 months ago, # |
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Clashing with AtCoder Beginner Contest 216 :(

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3 months ago, # |
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How come is it that every time starters end up clashing with ABC even though the target audience for both contests are similar. I mean Atcoder hosts ABC every weekend so you should at least check for clash beforehand after it was brought to your notice for the first time.

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    3 months ago, # ^ |
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    Maybe it's the check for which one is more stable and attracts more audience :)

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3 months ago, # |
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3 months ago, # |
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Number of problems in each division? Utkarsh.25dec

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    3 months ago, # ^ |
    Rev. 3   Vote: I like it +5 Vote: I do not like it

    6 in division 2 and 6 in division 3. Both divisions share 4 problems

    Edit — We decided to give one more problem in div3 so there are 7 problems in div 3 now and there are now 5 shared problems

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3 months ago, # |
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In Magical Flips Problem i print cout<<cnt<<' '<<ans<<endl; instead of cout<<ans<<' '<<cnt<<endl;

But its magically passed sample. got that after 2 WA and 12 min penalty tho xD

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3 months ago, # |
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the submissions of div2C started increasing so rapidly.:(

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

Div 2 C

Some guy posted a solution in a "famous for cheating telegram group" and the count of submissions rose to 1000+ from 250 in just 15 minutes.

Utkarsh.25dec, nishant403, infinitepro, roy.satyam please have a plag check!

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    3 months ago, # ^ |
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    Don't worry, plag check is done in every contest.

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      3 months ago, # ^ |
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      Utkarsh.25dec, It seems like rating has been updated and my rank is same as before. So basically the plagiarism detector has literally caught 0 people whereas we can easily see that every last minute submissions are exactly same / leaked.

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        3 months ago, # ^ |
        Rev. 2   Vote: I like it +7 Vote: I do not like it

        As far as I know, in codechef plag detector is run few days after the contest has ended. So after the plag check ratings might be re-updated

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          3 months ago, # ^ |
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          codechef plag detector is run few days after the contest has ended.

          Few years*

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3 months ago, # |
Rev. 3   Vote: I like it 0 Vote: I do not like it

This person is literally revealing the solution of problem A,B,C of div2 on Youtube

His youtube account

And his codechef ID

Link he give during the contest of problem C and you can easily see that last most of submission of this problem is totally same as in the given link,

Before half hour of contest end my rank is about 700 and suddenly just after 15 minutes my rank was 1500. This is really disgusting. Due to these cheaters our rank does't give confidence to Newbies like me. I hope it will change in future,

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    3 months ago, # ^ |
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    By no means there is 100% way to get rid of cheaters.

    The best way to improve is to ignore them and focus on self.

    We definitely try to reduce the cheating measures and hoping that it reduces in future.

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      3 months ago, # ^ |
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      We definitely try to reduce the cheating measures

      How?

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      3 months ago, # ^ |
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      1. How are you trying to reduce cheating?
      2. How can one focus on oneself when one's rank drops by a huge margin? Isn't it really frustrating?

      Kindly give insights on how you currently/plan to tackle these issues.

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3 months ago, # |
  Vote: I like it +1 Vote: I do not like it

In Div2 D ( Grid Path ) I started of with submitting a recursion+memorization code ( O(n*n*k) ).. but it TLed at one of the testcase [ I also included the snippet to increase stack memory ]

But writing the same logic iteratively, it passed with (0.18 time).. Though i know that recursive+memo is comparatively slow but never knew it was this slow..

Is this the general case or there's something different with codechef testing system only ??

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3 months ago, # |
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problem .Grid Path in div2..how can i approach this?.any hint..