Pretty Good Cube Root

Given a positive integer $x$, the cube root of $x$ may or may not be an integer.
We’ll define an *approximate* cube root of $x$ as the positive integer
$y$ such that $y^3$ is as close is possible to
$x$.

Input has up to $100$ lines with one positive integer per line. Each integer may have as many as $500$ digits. Input ends at the end of file.

For each input integer, print out its approximate cube root.

Sample Input 1 | Sample Output 1 |
---|---|

64 472741006443 65991621053219768206433 |
4 7790 40410690 |