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5:32 PM
Doh!
 
 
4 hours later…
9:34 PM
\$\cube(x)\$
\$cuberoot(x)\$
\$ cbrt(x) \$
\$ \cbrt(x) \$
\$ x^2 \$
\$O(n^2)\$
Well ... that ends that.
$$O(n^2)$$
 

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