I'm using Ruby to solve this. If I run Math.cbrt(216) % 1 in CodeWars I get 8.818 etcetc. But when I run it in irb I get 0, as expected. Anyone know what's up with that?

code's gotta go red before it goes green!

I am having the same problem. Giacomo this is the book you are recommending correct?
https://mitpress.mit.edu/books/introduction-algorithms

`each': failed to allocate memory (NoMemoryError)

yes thank you that worked!

am I missing something? this test failed, but my result seems to match the expected.
Expected: "Phone => 1-908-512-2222, Name => Peter O'Brien, Address => High Street CC-47209",
nstd got: "Phone => 1-908-512-2222, Name => Peter O'Brien, Address => High Street CC-47209"

if anyone needs it, this helped me to make the binary numbers
http://www.mathcs.emory.edu/~cheung/Courses/255/others/BinNumReps.html

I haven't gotten my code to pass the tests but maybe an if statement would do it? i.e. if n**3 + (n-1)3..+13 does not equal or is greater than m, return -1. again, I haven't passed this yet so maybe I am speaking out of turn but maybe this might help you!

thanks! nice Kata!

thanks so much! that cleared it up for me!

Hi-I had a hard time solving this too, I didn't really understand the question and had a hard time visualizing it. One thing that helped me was to look at diagrams of 2 cubed, 3 cubed, etc. You'll see that 2 cubed has zero rows in between, but that 3 cubed has 1 row between. 4 cubed has 2 rows in between. Hope this helps you a bit!