Mr_Tree_HLD_LCA_Master's blog

By Mr_Tree_HLD_LCA_Master, history, 3 weeks ago, In English

Good morning everyone.

I wanted to do something other than cp these days since IOI selection is coming soon.So i decided to make something like an checker to find coupons.

To be more detailed there is a popular site in my country where you order food online.However there is a coupon place were you put a coupon number/string an you get some money off.

So the guy who made the site is not good and he made it such that the coupons are always of the form foodlove and some number after.

Like a coupon might be foodlove133 ,foodlove4556 .So its foodlove and a number with at most 10 digits.

But not all coupons are valid.

So i want to find someone with experience before to help me make a program that automatically checks every coupon and finds all that are valid. You will be rewarded good to help me to this.

Also this has nothing to do with cp, its more on the practical side rather than the algorithms side.

Dm me to know more and to help me.

Thank you!

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By Mr_Tree_HLD_LCA_Master, history, 7 weeks ago, In English

Good morning/afternoon/evening Codeforces people,

I decided to make my own High tech trailer about my channel with amazing graphic.

I am sure that you will like it its absolutely amazing to geeks.

Watch here:

https://www.youtube.com/watch?v=fVeewWx9hMo&ab_channel=AndrewRasvanis

Subscribe also wether you think i am making good quality : https://www.youtube.com/channel/UCRChK6FdCVNQehFbxTnXzJQ

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By Mr_Tree_HLD_LCA_Master, history, 7 weeks ago, In English

Good morning/afternoon/evening Codeforces people,

I decied to make my own exclusvie movie with Codeforces.

Now i know there are others who made too but this i am creating is exclusive and it takes lot of time to create and its from professionals.

Disclaimer : I am sorry about the watermark but i dont think they are that annoying and visible.

Here is the trailer and i hope you like it:

https://youtu.be/eBCN4P_EIEU

I would appreciate your subscribtion which supports my channel and a lot other things.

Subscribe : https://www.youtube.com/channel/UCRChK6FdCVNQehFbxTnXzJQ

Thanks everybody.

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By Mr_Tree_HLD_LCA_Master, history, 2 months ago, In English

I found a site that has most ejoi 2020 problems and most of olympiads and i submitted solutions but the thing is that it's unreadble cause its some kind of chinese and i think the subtasks dont work.

Here is the link to the ejoi:https://www.acmicpc.net/category/detail/2359

But it's something to submit and it has many olympiads.

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By Mr_Tree_HLD_LCA_Master, history, 2 months ago, In English

Good morning/night/afteroon Codeforces Community,

Recently i saw the prices in Codechef and Codeforces it made me wonder how come Codehef gives much more money than codeforces and when i say much more i mean it.

The thing is that Codechef gives money to setting,testing,translation and editorialists and Codeforces only to setting as far as i know.

Lets look at the prices in Codechef (seting only):

Now from a friend of mine that is setting in Codeforces he told me that the whole Div 2 he and another one are preparing will be 200-220 euros in total.

Isnt that crazy?

That amount of money from a high quality contest in codeforces is same as a hard problem in Codechef.

I mean look at the price to set a Codechef whole contest: it comes around 530 USD.

Now i know its USD and not Euro cause i thinnk many people will say that i confused it but no i have done the calculations and i can see that even in euros its much.

One reason is that an admin told me that in Codechef Easy-Medium is same as Div 1 A / Div 2 C problem Codeforces so that means a hard probem in Codechef is around Div 1 C althought i dont believe it at all and i think most people wont believe it.So i dont think this is the reason.So anyone that has experience before and knows something please comment below.

Now lets go to the part of translation:

Testing:

And Editorialist part:

I mean here its just prices so since Codeforces doesnt pay these things there isnt much to say than just a big WHY?

Is it becuase more work,participants,what is it?

I dont think its any of those but i think a reason is maybe because Codeforces spends a lot money to preserve such good site and Codechef doesnt (thats why they have this whole situation with cheaters).

But still of course Codechef preserves its site so i still dont think it's this

It's not that i have something against Codechef or Codeforces plus that is better to whom sets problems in Codechef,i am just wondering.

I may be totally wrong but i was just trying to justify the things i saw.

Thanks

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By Mr_Tree_HLD_LCA_Master, history, 3 months ago, In English

Do you know any information (place/date)?

I think i heard its gonna be held in Georgia sice this year it was kind- of online.

(It was gonna be in Armenia but 2020 ruined it )

Do you think its gonna be again online?

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By Mr_Tree_HLD_LCA_Master, history, 3 months ago, In English

CF is ending Its coming and its near.......

No new problems are found

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By Mr_Tree_HLD_LCA_Master, history, 3 months ago, In English

Do you know any problems that need fusion trees (even in theoretical cp)

I found only a wiki and some MIT lectures but not any good problems that needed it

As far as i know its some good hard but mostly theoretical thing (out of contests and cp material).

I know only 1 problem that needed it to get to O(1).

Any help would be wanted (especially from MIT cs students they must have done it).

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By Mr_Tree_HLD_LCA_Master, history, 3 months ago, In English

Good evening/morning/night CF community.

As i saw i gained some subscribers form my stream about usaco gold/plat and thank you so much.

I am sorry that the streamwas stuck a little bit as it was my first time streaming and i couldnt talk loud (casue there was an MIT interview going int the house that time) so the quality didnt work out as i planned.

Besides all these i made a poll where you can vote what you want to me to teach in my next videos

Here is the link: https://strawpoll.com/jkb12y2ae

My favourite is the first topic!!!

Note:You can comment here anything other you want that isnt in there.

I will try to post more often but since i am 14 i have school and a lot other sciences i study and i cant do both so maybe like every week i can do 1-2 videos.

Make sure to subscribe to my channel: https://www.youtube.com/channel/UCRChK6FdCVNQehFbxTnXzJQ

Thank you

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By Mr_Tree_HLD_LCA_Master, history, 3 months ago, In English

THe stream will start at 22 minutes (6:30 pm EEST)

Refer to here: https://codeforces.com/blog/entry/86847

Stream will be Here: https://www.youtube.com/channel/UCRChK6FdCVNQehFbxTnXzJQ

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By Mr_Tree_HLD_LCA_Master, history, 3 months ago, In English

Hey guys my name is Andrew Rasvanis and i am 14 years old.

I have been doing 2.5 years cp now and i have gone to 2 Olympiads (EJOI).

I am currently training to go to IOI 2021 and EJOI 2021 of-course.

Today i am gonna stream today about all these I said (CSES,USACO,Advanced Algos).

So i have a poll here : https://strawpoll.com/g86o8116b where you can vote about what time i shoud stream.

Note: I live in Greece

I know ther is Atcoder in about 30 minutes so probably i will stream after 2 hours from now.

Also another poll here : https://strawpoll.com/2ygv6caoq about where do you want to watch i think i will stream twitch and who wants youtube i can there too.

So besides that you can comment down ideas you would want me to teach either in this stream or in another video.

I dont have a lot time cause i have mutliple things doing right now.

I would appreciate if you subscribe here: https://www.youtube.com/channel/UCRChK6FdCVNQehFbxTnXzJQ

and here: https://www.twitch.tv/andrew_rasvanis

Dm me anything you need and feel free to ask!!!

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