Schedule Mode Builder

Schedule Mode Builder


You are given an unordered list of tasks. Each task is as string, which incudes a start and end of task and has a view "hh:mm-hh:mm". Tasks are unique. You function must return chronologically sorted, filtered list of tasks, which can be scheduled without overlapping. For this purpose, you are also given a mode as an integer, which tells you the rule of choosing non-overlapping tasks.


  • 1: earliest start among available, (if a few variants) shortest duration;
  • 2: earliest start among available, (if a few variants) longest duration;
  • 3: longest total duration of chosen tasks, (if a few variants) larger number of tasks done, (if a few variants) earliest;
  • 4: larger number of tasks done, (if a few variants) longest total duration of chosen tasks, (if a few variants) earliest.

At animation tasks are always sorted as earliest start + shortest duration. Each task is positioned on the first "row", where it is not overlapping with the previous task in a "row". If the current task is overlapping with all existed "rows" - the new "row" is started. For example, for the input [['09:00-10:00', '09:50-10:10', '10:00-11:00', '09:00-09:20', '10:50-11:10'], 2], the animation (solved) would be the following:


Input: A list of tasks as strings (str).

Output: A sorted filtered list of tasks as strings (str).


assert schedule(
    ["09:00-10:00", "09:50-10:10", "10:00-11:00", "09:00-09:20", "10:50-11:10"], 1
) == ["09:00-09:20", "09:50-10:10", "10:50-11:10"]
assert schedule(
    ["09:00-10:00", "09:50-10:10", "10:00-11:00", "09:00-09:20", "10:50-11:10"], 2
) == ["09:00-10:00", "10:00-11:00"]
assert schedule(
    ["09:00-10:00", "09:50-10:10", "10:00-11:00", "09:00-09:20", "10:50-11:10"], 3
) == ["09:00-10:00", "10:00-11:00"]
assert schedule(
    ["09:00-10:00", "09:50-10:10", "10:00-11:00", "09:00-09:20", "10:50-11:10"], 4
) == ["09:00-09:20", "09:50-10:10", "10:50-11:10"]
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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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