Remove All Before Remove All Before
English JA UK PL RU

Not all of the elements are important. What you need to do here is to remove from the list all of the elements before the given one.


For the illustration we have a list [1, 2, 3, 4, 5] and we need to remove all elements that go before 3 - which is 1 and 2.

We have two edge cases here: (1) if a cutting element cannot be found, then the list shoudn't be changed. (2) if the list is empty, then it should remain empty.

Input: List and the border element.

Output: Iterable (tuple, list, iterator ...).


remove_all_before([1, 2, 3, 4, 5], 3) == [3, 4, 5]
remove_all_before([1, 1, 2, 2, 3, 3], 2) == [2, 2, 3, 3]
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.

<< <
> >>

Whats Next?

Free accounts will see Best CheckiO solutions with some delay.
Best Solutions will be opened in
Become Awesome and Don't wait
The next stage is ""
Will be activated in
View More Solutions Random Review Solutions Share your own solution
Go to the next mission Back to the list of missions Back to the map