The cubed_sum calculates the sum of cubes for a specified range. The naive implementation is just adding cubed numbers. The time complexity is O(n). A more efficient method would involve using the mathematical formula for the sum of cubes, which can compute the result in constant time O(1).
The definition of the sum of cubes and related formulas: The sum of cubes
Additinally, the cubed_sum can calculates the even and odd sums of cubes.
Clone the repository.
git clone https://github.com/easai/cubed_sum.gitGo to the installed directory, and run poetry install.
poetry installRun poetry run pytest to run the pytest file.
poetry run pytestCalculate the sum of cubes of all numbers in a range by calling cubed_sum() method. The parity is set to both even and odd (Parity.BOTH) by default.
print(cubed_sum(1, 5, parity=Parity.BOTH)) # Sum of cubes of all numbers from 1 to 5
print(cubed_sum(1, 5, parity=Parity.EVEN)) # Sum of cubes of even numbers from 1 to 5
print(cubed_sum(1, 5, parity=Parity.ODD)) # Sum of cubes of odd numbers from 1 to 5