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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()'
35 lines
711 B
Python
35 lines
711 B
Python
"""
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2^15 = 32768 and the sum of its digits is 3 + 2 + 7 + 6 + 8 = 26.
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What is the sum of the digits of the number 2^1000?
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"""
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def solution(power):
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"""Returns the sum of the digits of the number 2^power.
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>>> solution(1000)
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1366
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>>> solution(50)
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76
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>>> solution(20)
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31
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>>> solution(15)
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26
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"""
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num = 2 ** power
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string_num = str(num)
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list_num = list(string_num)
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sum_of_num = 0
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for i in list_num:
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sum_of_num += int(i)
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return sum_of_num
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if __name__ == "__main__":
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power = int(input("Enter the power of 2: ").strip())
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print("2 ^ ", power, " = ", 2 ** power)
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result = solution(power)
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print("Sum of the digits is: ", result)
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