Dominater069's blog

Invitation to CodeChef Starters 218 (Rated till 5-Stars) — 24th December
By Dominater069, history, 5 months ago, In English

We invite you to participate in CodeChef’s Starters 218, this Wednesday, 24th December, rated for 5 stars (i.e. for users with rating < 2200).

Time: 8:00 PM — 10:00 PM IST

Joining us on the problem setting panel are:

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!

  • Vote: I like it
  • +47
  • Vote: I do not like it

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

Contest starts in 30 minutes.

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

is site down ? for me it's just a white background with constant loader https://ibb.co/DfNC3Sj3

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5 months ago, hide # |
 
Vote: I like it +10 Vote: I do not like it

nice problem set!

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

Really loved the problems especially "Collartz Conjecture". Though I thought many people would solve it idk why less people solved.

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    5 months ago, hide # ^ |
    ← Rev. 2  
    Vote: I like it 0 Vote: I do not like it

    If the last two bits are zero, it "yes". I think a lot of people miss this, like me

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      5 months ago, hide # ^ |
      ← Rev. 2  
      Vote: I like it 0 Vote: I do not like it

      Yes!

      For the counts notice last 2 digit in div by 4 is 00 so operation makes +4 to number. You don't want switch to odd>3 so either add 4 or do n/2. Also you don't want number divisible by 2 but not by 4. This tells when to do +4 and when n/2

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