The Rows of Cakes

The Rows of Cakes


"We must burn the house down!" said the Rabbit's voice; and Alice called out as loud as she could, "If you do. I'll set Dinah at you!"

There was a dead silence instantly, and Alice thought to herself, "I wonder what they WILL do next! If they had any sense, they'd take the roof off." After a minute or two, they began moving about again, and Alice...

Input: Сoordinates as a list of lists with two integers.

Output: The quantity of rows as an integer.


checkio([[3, 3], [5, 5], [8, 8], [2, 8], [8, 2]]) == 2
checkio([[2, 2], [2, 5], [2, 8], [5, 2], [7, 2], [8, 2], [9, 2], [4, 5], [4, 8], [7, 5], [5, 8], [9, 8]]) == 6

How it is used: This is an example of the image and pattern recognition. This concept can be useful for the game mechanics or if you want to write a bot for games, or when transposing printed text to a digital format.

Precondition: 0 < |coordinates| < 20
∀ x,y ∈ coordinates : 0 ≤ x,y ≤ 10

You should be an authorized user in order to see the full description and start solving this mission.
Invalid hot key. Each hot key should be unique and valid
Hot keys:
CheckiO Extensions

CheckiO Extensions allow you to use local files to solve missions. More info in a blog post.

In order to install CheckiO client you'll need installed Python (version at least 3.8)

Install CheckiO Client first:

pip3 install checkio_client

Configure your tool

checkio --domain=py config --key=

Sync solutions into your local folder

checkio sync

(in beta testing) Launch local server so your browser can use it and sync solution between local file end extension on the fly. (doesn't work for safari)

checkio serv -d

Alternatevly, you can install Chrome extension or FF addon

checkio install-plugin
checkio install-plugin --ff
checkio install-plugin --chromium

Read more here about other functionality that the checkio client provides. Feel free to submit an issue in case of any difficulties.

Pair Programming (Beta-version)

Welcome to Pair Programming! Engage in real-time collaboration on coding projects by starting a session and sharing the provided unique URL with friends or colleagues. This feature is perfect for joint project development, debugging, or learning new skills together. Simply click 'Start Session' to begin your collaborative coding journey!

Waiting for Pair Programming to start...

You are trying to join a pair programming session that has not started yet.

Please wait for the session creator to join.

Waiting for Pair Programming to reconnect...

It looks like the creator of the pair programming session closed the editor window.

It might happen accidentally, so that you can wait for reconnection.

<< <
> >>
exec show

Whats Next?

Free accounts will see Best CheckiO solutions with some delay.
Best Solutions will be opened in a moment
Become Awesome and Don't wait
The next stage is ""
Will be activated in
View More Solutions Random Review Solutions Go to the next mission