Follow Instructions

Follow Instructions


You’ve received a letter from a friend whom you haven't seen or heard from for a while. In this letter he gives you instructions on how to find a hidden treasure!

In this mission you should follow a given list of instructions which will get you to a certain point on the map. A list of instructions is a string, each letter of this string points you in the direction of your next step.

The letter "f" - tells you to move forward, "b" - backward, "l" - left, and "r" - right.

It means that if the list of your instructions is "fflff" then you should move forward two times, make one step to the left and then again move two times forward.


Now, let's imagine that you are in the position (0, 0). If you move forward your position will change to (0, 1). If you move again it will be (0, 2). If your next step is to the left then your position will become (-1, 2). After the next two steps forward your coordinates will be (-1, 4).

Your goal is to find your final coordinates. Like in our case they are (-1, 4).

Input: A string (str).

Output: A tuple or list of two integers (int).


assert list(follow("fflff")) == [-1, 4]
assert list(follow("ffrff")) == [1, 4]
assert list(follow("fblr")) == [0, 0]

How it is used: in games with a map.

Precondition: only chars f, b, l and r are allowed.

Invalid hot key. Each hot key should be unique and valid
Hot keys:
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.

Pair Programming (Beta-version)

Welcome to Pair Programming! Engage in real-time collaboration on coding projects by starting a session and sharing the provided unique URL with friends or colleagues. This feature is perfect for joint project development, debugging, or learning new skills together. Simply click 'Start Session' to begin your collaborative coding journey!

Waiting for Pair Programming to start...

You are trying to join a pair programming session that has not started yet.

Please wait for the session creator to join.

Waiting for Pair Programming to reconnect...

It looks like the creator of the pair programming session closed the editor window.

It might happen accidentally, so that you can wait for reconnection.

<< <
> >>
exec show

Whats Next?

Free accounts will see Best CheckiO solutions with some delay.
Best Solutions will be opened in a moment
Become Awesome and Don't wait
The next stage is ""
Will be activated in
View More Solutions Random Review Solutions Go to the next mission