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First solution in Clear category for Unlucky Days by Krischtopp
import calendar
def checkio(year):
return [calendar.weekday(year, month, 13) for month in range(1, 13)].count(4)
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
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