RockyB's blog

By RockyB, 3 months ago, translation, In English,

Hi everyone :)

Recently I started to work as CP tutor/coach, doing online lessons, though I have been teaching CP for several years. Probably CF is not that appropriate place to ask this (saying sorry), but I'm very curious how can I find english speaking students?

Some of the Olympiad achievements are 2 Gold Medals on Kazakhstan National Olympiad in Informatics, Gold Medal on the International Zhautykov Olympiad and Bronze Medal on the International Olympiad in Informatics.

FAQ:

  • Price: just reach me by private message to discuss the price
  • Teaching time: can teach any time you want (private message for details)
  • Requirements: anyone with passion to programming can join my lessons

Don't hesitate to PM in Telegram/Facebook or write an Email.

Thank you!

Please, don't downvote. Your care and attention will help me very much :)

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By RockyB, history, 6 months ago, translation, In English,

Hi everyone :)

If you have proper and prior experience, could you give some advices in preparation for the IOI? On what should my concentration be to do well?

If probably you can't give any advice because these questions are too general I put some questions below.

  • How many hours did you prepare everyday to show your best on the IOI?
  • What type of problems did you solve?
  • What resources did you use?
  • Should I do some math stuff?
  • How to learn to solve problems which need a lot of observations, concepts?

Thank you so much!

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By RockyB, 23 months ago, In English,

Hi everyone!

I made order on CodeChef, on october 31 and it was dispatched on november 8

Tracking service still does not work and support did not reply me

If you once made order, how much time did you wait?

Thank you in advance!

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By RockyB, 23 months ago, In English,

I will write blog about my preparation.

You can see it here :)

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By RockyB, 2 years ago, translation, In English,

Hi CodeForces!

In this blog written that in problems Divide and Conquer Optimization opt[i] <= opt[i + 1]

opt[i] -> such k that gives optimal answer, for example dp[i] = dp[k - 1] + C[k][i]

Please, can you explain why?

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By RockyB, 3 years ago, translation, In English,

Hi CodeForces!

It's again me :D

For a long time i noticed such bug, when you open status of submissions and you can't open next page.

Please fix it.

UPD : fixed :)

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By RockyB, 3 years ago, In English,
 
 
 
 
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By RockyB, 3 years ago, translation, In English,

Hello CodeForces)

I was solving one problem, and a lot of time I couldn't understand why i got WA

WA code -> 
if (n > 1){
  if (Check(n)) Update(n, 1);
  else if ((ll)sqrt(n) * (ll)sqrt(n) == n) Update((ll)sqrt(n), 2);
}
AC code -> 
double x = n;
x = sqrt(x);
if (n > 1){
  if (Check(n)) Update(n, 1);
  else if ((ll)x * (ll)x == n) Update((ll)x, 2);
}

In first code if n = 302500001100000001 sqrt(n) = 550000000 but right is 550000001

I tryed to check in CodeForces custom test, it's error only in my and OJ compiler

Tell me why???

Give me some hint, how to upload photo in HQ???

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By RockyB, history, 3 years ago, In English,
Tags bag
 
 
 
 
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By RockyB, history, 3 years ago, In English,
 
 
 
 
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By RockyB, history, 4 years ago, In English,

No rated contests, no sentiment

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