73 lines
1.1 KiB
Python
73 lines
1.1 KiB
Python
target = 171
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def is_leap_year (year):
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return year % 4 == 0 and (year % 100 != 0 or year % 400 == 0)
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def days_since_1900 (year, month = 1, day = 1):
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days = 0
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for y in range(1900, year):
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if (is_leap_year(y)):
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days += 366
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else:
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days += 365
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for m in range(1, month):
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days += get_days_in_month(m, year)
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days += day - 1
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return days
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days_in_month = [
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None,
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31,
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28,
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31,
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30,
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31,
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30,
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31,
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31,
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30,
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31,
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30,
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31,
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]
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week_days = [
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'mon',
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'tue',
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'wed',
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'thu',
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'fri',
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'sat',
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'sun',
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]
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def get_days_in_month (month, year):
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days = days_in_month[month]
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if (month == 2 and is_leap_year(year)):
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return days + 1
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return days
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def get_day_of_week (year, month, day):
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days = days_since_1900(year, month, day)
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rest = days % 7
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return week_days[rest]
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count = 0
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for year in range(1901, 2001):
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for month in range(1, 13):
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if (get_day_of_week(year, month, 1) == 'sun'):
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count += 1
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print(count)
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print(count == target)
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