It is not working anymore, bcs it was invalidated by introducing BigInt instead strings before.

Your forumla is correct, but remember that you have two dimensions here.

https://www.codewars.com/kata/reviews/638c97f52e6f410001ee2b45/groups/6485e0d13dad1a0001978c08

This kata needs more tests + random tests too.

This kata need more tests

Ok, calculating center of mass does the job correctly.

18-hole (k=5): [1,0,0,0,0,1,1,0,0,0,0,0,1,0,1,0,0,0]

Can someone explain to me how is this balanced?

Is it unsolvable?

Server Execution Error:
Missing language
Request Error:
Request failed with status code 422
Please fix the issue and try again.

What do these errors mean?

If this solution is correct it means tests are weak.

https://instacode.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

Worst practice...