Score : $300$ points
Given is a positive integer $L$. Find the maximum possible volume of a rectangular cuboid whose sum of the dimensions (not necessarily integers) is $L$.
Input is given from Standard Input in the following format:
$L$
Print the maximum possible volume of a rectangular cuboid whose sum of the dimensions (not necessarily integers) is $L$. Your output is considered correct if its absolute or relative error from our answer is at most $10^{-6}$.
3
1.000000000000
For example, a rectangular cuboid whose dimensions are $0.8$, $1$, and $1.2$ has a volume of $0.96$.
On the other hand, if the dimensions are $1$, $1$, and $1$, the volume of the rectangular cuboid is $1$, which is greater.
999
36926037.000000000000