![[old] Even the Last](https://dk1vwk12q8pjl.cloudfront.net/media/logos/task/middle/even-last-disabled.png)
[old] Even the Last
给你一个整数数组，需要你把具有偶数索引的元素相加（0，2，4 ...），然后把相加后得到的数与最后一个元素相乘。 不要忘记，第一个元素的索引是0。
如果传入的是一个空数组，则应该返回0。
输入: 一个整数列表
...
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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