# Sort by Removing

Simple

Your goal is to create the fastest sorting algorithm ever - Sort By Removing.

You just need to remove all elements from a given array that are in the incorrect order. As always, we have some conditions:

• it's a non-descending sorting;
• the first element should always stay in the result list;
• the result of an empty list is an empty list;
• the elements are always non-negative integers.

Input: A list of non-negative ints.

Output: A list of non-negative ints.

Examples:

```sort_by_removing([3, 5, 2, 6]) == [3, 5, 6]
sort_by_removing([7, 6, 5, 4, 3, 2, 1]) == [7]
sort_by_removing([3, 3, 3, 3]) == [3, 3, 3, 3]
sort_by_removing([5, 6, 7, 0, 7, 0, 10]) == [5, 6, 7, 7, 10]
sort_by_removing([1, 5, 2, 3, 4, 7, 8]) == [1, 5, 7, 8]
```
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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:

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`checkio --domain=py config --key=`

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`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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