Park Benches Park Benches

You will need to remove some benches to keep the social distance.

You are given two arguments:

  1. A list of the bench's detail (a tuple of the leftmost coordinate and the length).
  2. The minimum social distance between benches.

In order to make sure that the distance between benches is at least the social distance, we remove some benches. What is the maximum total length of the remaining benches?


  • A list of the bench's detail is sorted.


park_benches([(0, 2), (3, 3)], 2) == 3                  # [(3, 3)]
park_benches([(1, 3), (6, 5), (13, 4)], 3) == 7         # [(1, 3), (13, 4)]
park_benches([(1, 2), (5, 6), (13, 3)], 3) == 6         # [(5, 6)]

Input: Two arguments:

  1. A list of tuples of two integers.
  2. An integer.

Output: An integer.


  • 1 ≤ len(benches) ≤ 100

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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