from datetime import date


def checkio(year: int) -> int:
    count = 0
    for month in range(1, 13):
        current_date = date(year, month, 13)
        if current_date.weekday() == 4:
            count += 1
    return count


if __name__ == '__main__':
    print("Example:")
    print(checkio(2015))

    # 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"
    assert checkio(2689) == 2, "Third"
    print("Coding complete? Click 'Check' to earn cool rewards!")