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d23e709aea
* maths/sum_of_digits.py: Streamline benchmarks
```
sum_of_digits(262144): 19 -- 0.3128329170285724 seconds
sum_of_digits_recursion(262144): 19 -- 0.34008108399575576 seconds
sum_of_digits_compact(262144): 19 -- 0.6086010000435635 seconds
sum_of_digits(1125899906842624): 76 -- 0.8079068749793805 seconds
sum_of_digits_recursion(1125899906842624): 76 -- 0.8435653329943307 seconds
sum_of_digits_compact(1125899906842624): 76 -- 1.247976207989268 seconds
sum_of_digits(1267650600228229401496703205376): 115 -- 1.6441589999594726 seconds
sum_of_digits_recursion(1267650600228229401496703205376): 115 -- 1.713684624992311 seconds
sum_of_digits_compact(1267650600228229401496703205376): 115 -- 2.2197747920290567 seconds
```
* updating DIRECTORY.md
* Update sum_of_digits.py
* Update sum_of_digits.py
Co-authored-by: github-actions <${GITHUB_ACTOR}@users.noreply.github.com>
75 lines
1.7 KiB
Python
75 lines
1.7 KiB
Python
def sum_of_digits(n: int) -> int:
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"""
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Find the sum of digits of a number.
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>>> sum_of_digits(12345)
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15
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>>> sum_of_digits(123)
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6
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>>> sum_of_digits(-123)
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6
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>>> sum_of_digits(0)
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0
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"""
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n = abs(n)
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res = 0
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while n > 0:
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res += n % 10
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n //= 10
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return res
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def sum_of_digits_recursion(n: int) -> int:
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"""
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Find the sum of digits of a number using recursion
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>>> sum_of_digits_recursion(12345)
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15
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>>> sum_of_digits_recursion(123)
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6
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>>> sum_of_digits_recursion(-123)
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6
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>>> sum_of_digits_recursion(0)
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0
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"""
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n = abs(n)
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return n if n < 10 else n % 10 + sum_of_digits(n // 10)
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def sum_of_digits_compact(n: int) -> int:
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"""
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Find the sum of digits of a number
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>>> sum_of_digits_compact(12345)
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15
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>>> sum_of_digits_compact(123)
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6
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>>> sum_of_digits_compact(-123)
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6
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>>> sum_of_digits_compact(0)
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0
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"""
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return sum(int(c) for c in str(abs(n)))
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def benchmark() -> None:
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"""
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Benchmark multiple functions, with three different length int values.
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"""
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from collections.abc import Callable
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from timeit import timeit
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def benchmark_a_function(func: Callable, value: int) -> None:
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call = f"{func.__name__}({value})"
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timing = timeit(f"__main__.{call}", setup="import __main__")
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print(f"{call:56} = {func(value)} -- {timing:.4f} seconds")
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for value in (262144, 1125899906842624, 1267650600228229401496703205376):
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for func in (sum_of_digits, sum_of_digits_recursion, sum_of_digits_compact):
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benchmark_a_function(func, value)
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print()
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if __name__ == "__main__":
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import doctest
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doctest.testmod()
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benchmark()
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