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267b5eff40
* Added doctest and more explanation about Dijkstra execution. * tests were not passing with python2 due to missing __init__.py file at number_theory folder * Removed the dot at the beginning of the imported modules names because 'python3 -m doctest -v data_structures/hashing/*.py' and 'python3 -m doctest -v data_structures/stacks/*.py' were failing not finding hash_table.py and stack.py modules. * Moved global code to main scope and added doctest for project euler problems 1 to 14. * Added test case for negative input. * Changed N variable to do not use end of line scape because in case there is a space after it the script will break making it much more error prone. * Added problems description and doctests to the ones that were missing. Limited line length to 79 and executed python black over all scripts. * Changed the way files are loaded to support pytest call. * Added __init__.py to problems to make them modules and allow pytest execution. * Added project_euler folder to test units execution * Changed 'os.path.split(os.path.realpath(__file__))' to 'os.path.dirname()'
28 lines
762 B
Python
28 lines
762 B
Python
"""
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A permutation is an ordered arrangement of objects. For example, 3124 is one
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possible permutation of the digits 1, 2, 3 and 4. If all of the permutations
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are listed numerically or alphabetically, we call it lexicographic order. The
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lexicographic permutations of 0, 1 and 2 are:
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012 021 102 120 201 210
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What is the millionth lexicographic permutation of the digits 0, 1, 2, 3, 4, 5,
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6, 7, 8 and 9?
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"""
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from itertools import permutations
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def solution():
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"""Returns the millionth lexicographic permutation of the digits 0, 1, 2,
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3, 4, 5, 6, 7, 8 and 9.
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>>> solution()
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'2783915460'
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"""
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result = list(map("".join, permutations("0123456789")))
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return result[999999]
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if __name__ == "__main__":
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print(solution())
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