thecoded.prof
CMU Coding Bootcamp
feat: oct 3 level 0
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python/oct3/level0/date.py
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python/oct3/level0/date.py
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def is_leap_year(yyyy: int) -> bool:
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return not (yyyy % 4 or (yyyy % 400 and not yyyy % 100))
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def sum_months(mm: int, yyyy: int) -> int:
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months = [31, 29 if is_leap_year(yyyy) else 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31]
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return sum(months[:mm])
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def nth_day(s: str) -> int:
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"""Calculate the nth day since the beginning of the year."""
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mm, dd, yyyy = map(int, [s[:2], s[2:4], s[4:]])
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day_since_new_year = dd + sum_months(mm-1, yyyy)
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return yyyy*1000 + day_since_new_year
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print("we're testing the nth day function...", end='')
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assert(nth_day("02072016") == 2016038)
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assert(nth_day("12201996") == 1996355)
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# assert(nth_day("abcdef") == None)
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assert(nth_day("12312020") == 2020366)
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assert(nth_day("12312021") == 2021365)
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print("and it passes the example cases")