Remove Brackets
在解决这个任务之前，您可以尝试解决"Brackets" 任务。
您的任务是删除不必要的括号，恢复开放式和封闭式括号的平衡，同时尽量减少删除次数。
在给定的字符串中，只能使用 3 种括号"()", "[]", "{}" 。
只有括号可以关闭括号。也就是说，在这个表达式"(}" 中，括号是不平衡的。在空字符串（即不包含任何括号的字符串）中，括号是平衡的，但删除所有括号并不是最佳解决方案。
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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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