ArtDitel's blog

By ArtDitel, history, 10 months ago, translation, In English,

Hey Codeforces!

We’d like to invite you to take part in our AIM Tech Mini Marathon 1 to be held this Thursday on the 1st of February at 7 pm MSK.

This is unrated competition. All the participants will be challenged with only one problem, which doesn’t have a fast and full solution and 3 hours to solve it. Solutions will be evaluated independently on each test. The exact formula of points per test will be given in the problem statement. The score for the contest is a sum of scores for each test. You can participate in contest as a team, 3 members maximum.

All the tests will be released at the very beginning of the competition. They will be used both for preliminary and final testing. You will be also provided with a checker and a visualizer, written in Python3. You can find environment setup instruction below. Local checker and vizualizer run is optional, but could help finding the solution. Your solution can be written in any language that is supported by codeforces.

AIM Tech Mini Marathon 1 will take place during the Petrozavodsk training camp, which is traditionally sponsored by AIM Tech. At the end of the competition first five teams will be awarded with AIM Tech T-shirts.

The Marathon was prepared by AIM Tech team: ArtDitel, Kostroma, SirShokoladina, zeliboba, Edvard, zloyplace35.

Special thanks to Mike Mirzayanov MikeMirzayanov for Codeforces and Polygon and to the problems coordinator Nickolay Kalinin KAN for his help with the competition arrangements.

AIM Tech is a high frequency trading company based in Moscow. The key words that describe the essence of our work are big data, low latency and HFT. Effective C++ coding, algorithmic mindset and the mathematical intuition are all very handy in our work. That’s why most of our employees are the winners of different programming and math contests. At free time AIM Tech team usually takes part in various programming competitions as well as challenges itself at hiking and mountaineering.

For more information on AIM Tech follow us on aimtech.com, facebook or instagram. Also feel free to write us any time via CF, VK, FB, Telegram or simply e-mail us. We are open to answer any of your questions including job openings.

We wish you all luck and high rating!

To run visualizer you need python3 with ‘pillow’ library. You can download Python3 here: https://www.python.org/downloads/. To install pillow simply run pip3 install pillow on Linux, Windows or MacOs. To check that everything works properly create a script file test.py:

from PIL import Image, ImageDraw
im = Image.new("RGB", (128, 128))
draw = ImageDraw.Draw(im)
draw.line((0, 0) + im.size, fill=128)
draw.line((0, im.size[1], im.size[0], 0), fill=128)
del draw
im.show()

and run it: python test.py. You will see a red cross with black background.

Please feel free to write a comment below.

UDP. There is no limit on a number of PCs in this contest, you may use up to one PC per participant

TCP. Every test will have it's own separate task, so every task will have only one test

IGMP. You can download the password-protected archive with tests and checked by any of the given links:

https://drive.google.com/file/d/1dkIBfW_Gy6c3FJtXjMXZPMsGKRyn3pzp

https://www.dropbox.com/s/77jrplnjgmviiwt/aimmaze.zip?dl=0

https://yadi.sk/d/JNXDLeH63RzaCi

Password: aimtechiscool. Please you only one of these links, not all

HTTP. Contest is over, congratulations for the winners:

  1. ИТМО 1: SpyCheese, izban, Belonogov 1191.717
  2. sdya 1188.534
  3. Moscow IPT: Shock Content: amethyst0, AndreySergunin 1179.33
  4. UW3: znirzej, tabasz, e-pluszak 1157.526
  5. Warsaw U: KMR: Errichto, Radewoosh, mareksom 1152.257
  6. Helsinki U: Ukkonen Fan Club: Hansuzu, mango_lassi, kllp 1152.007
  7. admarkov 1145.181
  8. MS TSV: grphil, voidmax, egor.lifar 1115.304
  9. Vilnius University #1: AllSubmissionsMatter: JustasK, Darius0021, jDomantas 1112.618
  10. Ural FU: Dandelion: Um_nik, Merkurev 1112.112

Please write your opinions in comments

 
 
 
 
  • Vote: I like it  
  • +234
  • Vote: I do not like it  

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10 months ago, # |
  Vote: I like it +12 Vote: I do not like it

What are the minimum and maximum number of members each team can have?

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    10 months ago, # ^ |
      Vote: I like it +12 Vote: I do not like it

    You can participate in contest as a team, 3 members maximum.

    Ty, fixed my post

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

Sounds interesting. Will the problem remain available for upsolving after the round?

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10 months ago, # |
  Vote: I like it +65 Vote: I do not like it

This is unrated competition.
We wish you all luck and high rating!
:thinking:

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    10 months ago, # ^ |
      Vote: I like it +17 Vote: I do not like it

    Why not to wish it? :) It's like to wish a Merry Christmas

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    10 months ago, # ^ |
      Vote: I like it +3 Vote: I do not like it

    This is unrated competition = Not change CF rate.

    We wish you all luck and high rating! = We wish high position on contest.

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10 months ago, # |
  Vote: I like it +3 Vote: I do not like it

How do we register? I don't have a link to register on the registration page?

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

    Registration will be opened in 14h :( Sorry, it does not depend on us

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10 months ago, # |
  Vote: I like it +3 Vote: I do not like it

it will be a great joy. tnQ for contest (;

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10 months ago, # |
  Vote: I like it +9 Vote: I do not like it

Are we going to be able to send solutions after contest ends?

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

Auto comment: topic has been updated by ArtDitel (previous revision, new revision, compare).

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10 months ago, # |
  Vote: I like it +3 Vote: I do not like it

Hope you enjoy this round. Wish everyone luck.

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10 months ago, # |
  Vote: I like it +6 Vote: I do not like it

we prefer c++ not python or something else!

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    10 months ago, # ^ |
      Vote: I like it +18 Vote: I do not like it

    You can write and submit solutions in any language that is supported by codeforces. But you will need python3 installed in order to run visualizer locally. This is optional and you can always solve without visulalizer

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10 months ago, # |
Rev. 2   Vote: I like it +10 Vote: I do not like it

Why red?)

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10 months ago, # |
  Vote: I like it -38 Vote: I do not like it

Is it rated?

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10 months ago, # |
  Vote: I like it +13 Vote: I do not like it

Is the problem some kind of artificial intelligence? or a hard competitive one?

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

command python3 doesnt working, use python

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10 months ago, # |
Rev. 2   Vote: I like it +23 Vote: I do not like it

"This is unrated competition".

"We wish you all luck and high rating!"

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10 months ago, # |
Rev. 3   Vote: I like it 0 Vote: I do not like it

As you told "All the tests will be released at the very beginning of the competition."

I have a confusion. You will give input and output for every test or you will give only input..

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

Auto comment: topic has been updated by ArtDitel (previous revision, new revision, compare).

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

Can you please tell us more detail ??? Will it be just like IOI interactive problems ??? I am not sure .....

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

    just wait till constest start and you will be able to read the statement

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

Auto comment: topic has been updated by ArtDitel (previous revision, new revision, compare).

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

de contest is rated

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10 months ago, # |
  Vote: I like it +3 Vote: I do not like it

Can anyone upload the file to pan.baidu.com or somewhere else? Google and dropbox are both blocked in China mainland :(

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10 months ago, # |
Rev. 2   Vote: I like it +73 Vote: I do not like it

one of the amazing mazes made by the awesome setters,it is a zoomed out image of the huge maze!! i enjoyed a lot today! thanks to you all!! ArtDitel, Kostroma, SirShokoladina, zeliboba, Edvard, zloyplace35

 another one

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    10 months ago, # ^ |
      Vote: I like it +48 Vote: I do not like it

    And I was so stupid that I did even try to solve #08 manually by first drawing the actual path for the "actual maze", and then hardcoding those directions to ".abc" with trial and error.

    Anyway, I still enjoyed solving it :P

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      10 months ago, # ^ |
        Vote: I like it +6 Vote: I do not like it

      well thats what we did!! we could figure out the pattern in the 5th and 14th maze and then we manually wrote a program! :P lol, but it was amazing!!

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

    Thanks for sharing this! I only looked at tests 1, 2, 3, 5 and 14 during the contest so I totally missed this beautiful art lol

    And I just got curious to what my program does so here's some zigzag:

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10 months ago, # |
  Vote: I like it +6 Vote: I do not like it

May I know why the following two outputs for #01 give different score?

This got 15.973pts with made_ops: 18:

for-8 move-down end
move-left

While this got 16.013pts with made_ops: 17:

move-left
for-8 move-down end

Did I miss anything from the statement? I am just curious...

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    10 months ago, # ^ |
    Rev. 2   Vote: I like it +15 Vote: I do not like it

    Citations from the statement: The robot will fulfill your commands sequentially until it exits the labyrinth... Each loop counter check counts as a command fulfilled by the robot. So 2nd program will make 1 operation less than 1st, as it reaches the exit before last counter check.

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      10 months ago, # ^ |
        Vote: I like it +1 Vote: I do not like it

      So it is meaning that end was counted once more in the first code? So sad that I didn't realize it... :(

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

That was really interesting, thank you for that!

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10 months ago, # |
  Vote: I like it +13 Vote: I do not like it

It was a really great contest! I enjoy a lot solving those problem!

I never used keys (excepting for problem 11). What was the simpler approach to use keys to improve the solution. I think about hard coding several problems where really obvious shortcuts exist, but I was too lazy to do that.

It would be really nice to read about smart solutions/ideas.

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

very inspiring problem!
thanks aim tech for problem-setting!