Problems
None of the two conditions
None of the two conditions
For the given integer $n$ print "\textbf{YES}", if none of the next conditions takes place and "\textbf{NO}" otherwise.
\begin{itemize}
\item number $n$ is even and positive;
\item number $n$ is odd and negative.
\end{itemize}
\InputFile
One integer $n$.
\OutputFile
Print "\textbf{YES}" or "\textbf{NO}" depending on conditions.
Input example #1
7
Output example #1
YES
Input example #2
24
Output example #2
NO