Remove Brackets Remove Brackets
Simple
RU English

Before solving this mission, you can try to solve the "Brackets" mission.

Your task is to restore the balance of open and closed brackets by removing the unnecessary ones, while trying to use the minimum number of deletions.

Only 3 types of brackets (), [] and {} can be used in the given string.

Only a parenthesis can close a parenthesis. That is, in this expression "(}" - the brackets aren’t balanced. In an empty string, i.e., in a string that doesn’t contain any brackets - the brackets are balanced, but removing all of the brackets isn’t considered to be an optimal solution.

If there are more than one correct answer, then you should choose the one where the character that can be removed is closer to the beginning. For example, in this case "[(])", the correct answer will be "()", since the removable brackets are closer to the beginning of the line.

Input: A string of characters () {} []

Output: A string of characters () {} []

Example:

remove_brackets('(()()') == '()()'
remove_brackets('[][[[') == '[]'
remove_brackets('[[(}]]') == '[[]]'
remove_brackets('[[{}()]]') == '[[{}()]]'
remove_brackets('[[[[[[') == ''
Settings
Code:
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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