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First solution in Clear category for Unlucky Days by Elater
import datetime
def checkio(year):
ile=0
for x in range(1,13):
if (datetime.date(year,x,13).weekday()==4):
ile=ile+1
return ile
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"
Nov. 29, 2016
