Simple
English

Let's teach Stephan to recognize simple numbers. The Robots use monospaced fonts with low resolution. You can see the font on the picture below. This font has noise immunity to one-pixel error.

Your program should read the number shown in an image encoded as a binary matrix. Each digit can contain a wrong pixel, but no more than one for each digit. The space between digits is equal to one pixel (just think about "1" which is narrower than other letters, but has a width of 3 pixels).

Input: An image as a list of lists with 1 or 0.

Output: The number as an integer.

Example:

checkio([[0, 1, 1, 1, 0, 0, 1, 1, 0, 1, 0, 1, 0],
[0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0],
[0, 0, 1, 0, 0, 1, 1, 1, 0, 1, 1, 1, 0],
[0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 1, 0],
[0, 1, 1, 1, 0, 1, 1, 0, 0, 0, 0, 1, 0]]) == 394
checkio([[0, 1, 1, 1, 0, 0, 1, 1, 0, 1, 1, 1, 0],
[0, 0, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0],
[0, 0, 1, 0, 0, 1, 1, 1, 0, 1, 1, 1, 0],
[0, 1, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0],
[0, 1, 1, 1, 0, 1, 1, 0, 0, 0, 0, 1, 0]]) == 394

How it is used: This task will show you how optical character recognition works and will familiarize you with low-resolution fonts requiring noise-immunity. This can be useful for the systems that required the reliability.

Precondition: matrix_rows == 5
5 ≤ matrix_columns < 30
∀ x ∈ matrix : x == 0 or x == 1
digit_width == 3
Each digit contains no more than one wrong pixel.
digits_space == 1

45
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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

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!

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