You are planning the train schedule and you want to know the minimum time of traveling between the stations.
Each section of the rail between stations is given in the list.
Each section is a tuple of distance and speed limit (both are integers).
You can change the speed ( +1. -1 and ± 0 ) at the start and every minute after that.
Note: This means that a train with a speed 2 will travel a distance 2 before another minute passes and its speed can be changed again.
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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=py config --key=
Sync solutions into your local folder
(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 --ff
checkio install-plugin --chromium