Screenplay: C++: Exercise Structure
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.. sidebar:: Contents

   .. contents::
      :local:

   **Code**: :doc:`code/index`

Problem
-------

Exercises usually have

* A *specification*, given by the trainer in the form of one or more
  *test cases*.
* *Multiple almost identical implementations*.

The latter - *identical implementations* - is the challenge.

Solution
--------

.. program-output:: tree 
   :cwd: code