Utkarsh.25dec's blog

Invitation to CodeChef Starters 10 (Rated for Div 2 & 3) — August 29, Sunday
By Utkarsh.25dec, history, 3 years 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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Comments Comments (21)
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3 years ago, # |
  Vote: I like it +3 Vote: I do not like it

Clashing with AtCoder Beginner Contest 216 :(

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3 years ago, # |
  Vote: I like it +39 Vote: I do not like it

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 years ago, # |
  Vote: I like it +40 Vote: I do not like it

Utkarsh.25dec :orz:

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3 years ago, # |
  Vote: I like it -8 Vote: I do not like it

Number of problems in each division? Utkarsh.25dec

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    3 years 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 years ago, # |
  Vote: I like it -19 Vote: I do not like it

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 years ago, # |
← Rev. 2   Vote: I like it +1 Vote: I do not like it

the submissions of div2C started increasing so rapidly.:(

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3 years 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, satyam343 please have a plag check!

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    3 years ago, # ^ |
      Vote: I like it -9 Vote: I do not like it

    Don't worry, plag check is done in every contest.

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

      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 years 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 years ago, # ^ |
            Vote: I like it +18 Vote: I do not like it

          codechef plag detector is run few days after the contest has ended.

          Few years*

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

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

      We definitely try to reduce the cheating measures

      How?

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

problem .Grid Path in div2..how can i approach this?.any hint..

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