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from decimal import Decimal | |
def is_armstrong_number(number): | |
digits = Decimal(number).as_tuple.digits() | |
exp = len(digits) | |
return sum(d**exp for d in digits) == number | |
def sum_all_armstrong_numbers(start, end): | |
start_, end_ = sorted([start, end]) | |
return sum(number for number in range(start_, end_+1) |
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digits :: (Integral n) => n -> [n] | |
digits = reverse . go | |
where go n | |
| n < 10 = [n] | |
| otherwise = r : digits q | |
where (q, r) = n `quotRem` 10 | |
numberLength :: Int -> Int | |
numberLength = length . digits |