Problem Statement

Find the radius of a circle with area $n$. However,

・Take pi to be $3$.
・An error of up to $1000000$ is allowed.
・Decimals and integers have not been taught yet, so answer with a positive natural number.

Input

$n$

$1 \leq n \leq 10^{12}$, $n$ is an integer

Output

Strictly speaking, for "the real value $r$ of the radius of a circle with area $n$, calculated with pi taken as $3$",
your output $r_{user}$ is judged correct if it is a positive natural number satisfying $r-10^6 \leq r_{user} \leq r+10^6$.

Sample

4

1000000