Binary Count

Binary Count

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For the Robots the decimal format is inconvenient. If they need to count to "1", their computer brains want to count it in the binary representation of that number. You can read more about binary here .

You are given a number (a positive integer). You should convert it to the binary format and count how many unities (1) are in the number spelling. For example: 5 = 0b101 contains two unities, so the answer is 2.

Input: A number as a positive integer.

Output: The quantity of unities in the binary form as an integer.


checkio(4) == 1
checkio(15) == 4
checkio(1) == 1
checkio(1022) == 9

How it is used: How to convert a number to the binary form. It can be useful for Computer Science purposes.

Precondition: 0 < number ≤ 2 32

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.

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