mirror of
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f7ac8b5ed0
* 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()' * Added Burrows-Wheeler transform algorithm. * Added changes suggested by cclauss * Fixes for issue 'Fix the LGTM issues #1024'. * Added doctest for different parameter types and negative values. * Fixed doctest issue added at last commit. * Commented doctest that were causing slowness at Travis. * Added comment with the reason for some doctest commented. * pytest --ignore
62 lines
1.1 KiB
Python
62 lines
1.1 KiB
Python
"""
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Problem Statement:
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The sum of the primes below 10 is 2 + 3 + 5 + 7 = 17.
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Find the sum of all the primes below two million.
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"""
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from __future__ import print_function
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from math import sqrt
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try:
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raw_input # Python 2
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except NameError:
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raw_input = input # Python 3
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try:
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xrange # Python 2
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except NameError:
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xrange = range # Python 3
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def is_prime(n):
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for i in xrange(2, int(sqrt(n)) + 1):
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if n % i == 0:
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return False
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return True
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def sum_of_primes(n):
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if n > 2:
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sumOfPrimes = 2
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else:
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return 0
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for i in xrange(3, n, 2):
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if is_prime(i):
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sumOfPrimes += i
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return sumOfPrimes
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def solution(n):
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"""Returns the sum of all the primes below n.
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# The code below has been commented due to slow execution affecting Travis.
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# >>> solution(2000000)
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# 142913828922
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>>> solution(1000)
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76127
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>>> solution(5000)
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1548136
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>>> solution(10000)
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5736396
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>>> solution(7)
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10
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"""
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return sum_of_primes(n)
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if __name__ == "__main__":
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print(solution(int(raw_input().strip())))
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