[old] Even the Last [old] Even the Last
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あなたは整数の配列が与えられます。 あなたはインデックスが偶数(0番目、2番目、4番目…)である要素の和を求めてから、この和と配列の最後の要素を掛けなければいけません。 最初の要素のインデックスが0であることを忘れてはいけません。

空の配列については、結果は常に0(ゼロ)になるでしょう。 ...

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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=js 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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