Calculate the number of Friday the 13th from 1900 to 2009.
.. literalinclude:: ../../languages/python/algorithm_fri_13.py :language: python :tab-width: 4
.. runcode:: ../../languages/python/algorithm_fri_13.py :language: python :codesite: ideone
.. seealso:: * :python-suggest-improve:`algorithm_fri_13.py` * :python-better-explain:`algorithm_fri_13.rst`