Alex_2oo8's blog

By Alex_2oo8, history, 2 months ago, In English,

Greetings Codeforces Community!

Hope you are doing well, practicing social distancing and are continuing to learn during this time. 

The CodeChef April Long Challenge will begin soon! That means 10 days of intense non-stop coding where you can learn while competing in a contest. 

The contest will be live from 3rd April till 13th April. So code, learn and don't forget to become a part of this exceptional race to the top of the leaderboard.

The problem statements will be available in English, Hindi, Bengali, Russian, Mandarin, and Vietnamese. 

Also if you have some original and engaging problem ideas, and you’re interested in them being used in the CodeChef's contests, you can share them here.

Code against Programmers from all over the globe in this thrilling contest! Accompanying me on the problem setting panel are:

  • Setters: Kritagya Agarwal, hackslash_123 (Raj Khandor), dvyn01 (Divyanshu Pandey), BohdanPastuschak (Bohdan Pastuschak), pieguy (David Stolp), 300iq (Ildar Gainullin), dragonado (Chaithanya Shyam), Ashish Lal
  • Tester: fmota (Felipe Mota)
  • Editorialist: taran_1407 (Taranpreet Singh)
  • Statement Verifier: xellos (Jakub Safin)
  • Admin: Alex_2oo8 (Alexey Zayakin)
  • Russian Translator: Fedosik (Fedor Korobeinikov)
  • Vietnamese Translator: Team VNOI
  • Bengali Translator: solaimanope (Mohammad Solaiman)
  • Hindi Translator: Akash Shrivastava
  • Mandarin Translator: I_love_PHP (Hanlin Ren)

Contest Details:

  • Time: 3rd April 2020 (1500 hrs) to 13th April 2020 (1500 hrs). (Indian Standard Time — +5:30 GMT) — Check your timezone.  

  • Contest link:

  • Registration: You just need to have a CodeChef handle to participate. For all those who are interested and do not have a CodeChef handle, are requested to register in order to participate.

  • Prizes: Top 20 performers in the Indian category and top 10 performers in the Global category will get CodeChef laddus, with which the winners can claim cool CodeChef goodies. First to solve each problem except challenge — 100 laddus. Know more here:

Good Luck! Hope to see you participating! Happy Programming!

  • Vote: I like it
  • +65
  • Vote: I do not like it

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

Just wondering

Is it not possible for setters of the round to make alternate accounts and win and claim the prize?

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

Hi all,

The editorials for all except TRIPWAYS and LLLGRAPH are posted at Sharing brief hints for last two problems here.


Hope you all had a nice contest. In case i made any mistake, do let me know.

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    7 weeks ago, # ^ |
    Rev. 2   Vote: I like it 0 Vote: I do not like it

    For TRIPWAYS, I tried modifying Berlekamp-Massey to use FFT but it is unclear how can lines 69-72 in the mull function be computed using FFT. Any pointers on that?

    • »
      7 weeks ago, # ^ |
        Vote: I like it 0 Vote: I do not like it

      This part is polynomial mod polynomial and it can be computed by polynomial division.

7 weeks ago, # |
  Vote: I like it +16 Vote: I do not like it

When will the rating be updated??

7 weeks ago, # |
  Vote: I like it 0 Vote: I do not like it

Why there was innn this contestt ?