#6_kyu_Build_a_pile_of_Cubes.py

Description:

"""
Your task is to construct a building which will be a pile of n cubes.
The cube at the bottom will have a volume of n^3, the cube above 
will have  volume of (n-1)^3 and so on until the top which will have a volume of 1^3.
You are given the total volume m of the building.
Being given m can you find the number n of cubes you will have to build?
The parameter of the function findNb (find_nb, find-nb, findNb) will be an integer m
and you have to return the integer n such as
n^3 + (n-1)^3 + ... + 1^3 = m
if such a n exists or -1 if there is no such n.
Examples:
findNb(1071225) --> 45
findNb(91716553919377) --> -1mov rdi, 1071225
call find_nb            ; rax <-- 45

mov rdi, 91716553919377
call find_nb            ; rax <-- -1
"""

My codes:

def find_nb(m):
    cubes = 0
    i = 1
    while cubes < m:
        cubes += i**3
        i += 1
    return i-1 if cubes == m else -1

Others codes:

def find_nb(m):
    n = 1
    volume = 0
    while volume < m:
        volume += n**3
        if volume == m:
            return n
        n += 1
    return -1

def find_nb(m):
    n = 1
    volume = 0
    while volume < m:
        volume += n**3
        if volume == m : return n
        n += 1
    return -1