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First solution in Clear category for Unlucky Days by hansauger
from datetime import date
def checkio(year):
s = 0
for i in range(12):
if date(year, i+1, 13).weekday() == 4:
s+=1
return s
if __name__ == '__main__':
#These "asserts" using only for self-checking and not necessary for auto-testing
assert checkio(2015) == 3, "First - 2015"
assert checkio(1986) == 1, "Second - 1986"
March 3, 2016
