Remove All Before Remove All Before
Elementary
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すべての要素が重要というわけではありません。ここで行う必要があるのは、list から指定された要素の前のすべての要素を削除することです。

example

この図では list [1, 2, 3, 4, 5] がありますが、3 より手前の要素をすべて取り除く必要があります。すなわち...

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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

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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