antontrygubO_o's blog

By antontrygubO_o, 7 weeks ago,

We invite you to participate in CodeChef’s May Lunchtime, this Sunday, 15th May, rated for all.

Joining me on the problem setting panel are:

Also, announcing Scholarship for CodeChef Certification in Data Structure & Algorithms — More than 100 Indian participants in Divisions 1, 2, and 3 will win scholarships for the CodeChef Certification exam (discounted prices). Scholarship criteria can be found on the respective contest pages.

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!

• +96

 » 7 weeks ago, # |   +1 Reminder: Contest starts in 30 minutes.
 » 7 weeks ago, # |   0 Are the amazon gift vouchers still there?
•  » » 7 weeks ago, # ^ |   -17 Nope
•  » » » 7 weeks ago, # ^ |   -14 When can we expect them to come back? They were a good incentive to practice.
•  » » » » 7 weeks ago, # ^ |   0 Sorry, it won't be back in the near-future. We don't have any concrete plans on when we might re-introduce them.
•  » » » 7 weeks ago, # ^ |   0 They have been removed even for div 1?
 » 7 weeks ago, # | ← Rev. 2 →   +62 What is the mathematical jugglery behind PWMUL?
•  » » 7 weeks ago, # ^ |   +8
 » 7 weeks ago, # | ← Rev. 2 →   0 anyone explain pls how to solve "Equal After And" task ?
•  » » 7 weeks ago, # ^ | ← Rev. 2 →   0 Here it is Editorial.
•  » » » 7 weeks ago, # ^ | ← Rev. 2 →   0 s=A1&A2&A3&A4......&Ani dont understand why we need to make all element equal to s? any proof?
•  » » » » 7 weeks ago, # ^ | ← Rev. 7 →   0 Let's say if array is partitioned into $k$ parts,where each part contribute to each number in the final array, and bitwise AND of each part is $a$ (values in the final array). Bitwise AND of the whole (original) array is basically the bitwise and of all $k$ final numbers, which is $a$($a$ & $a$ $=$ $a$). So that is why we have to make all elements equal to $s$.
•  » » » » » 7 weeks ago, # ^ |   +10 got it thanks :D
 » 7 weeks ago, # |   +16 Is there any particular reason that some submissions run faster in C++14 compared to C++17 on the judge ?