Write a program that which determines whether the point with the given coordinates is in the shaded area.
Input: The input string contains two real numbers – coordinates of a point on the plane (first x -coordinate, then – y -coordinate).
Output: The program should output the word 'YES' if the point is in the shaded area, and the word 'NO' if it is not. 
 
Examples
| # | 
Input | 
Output | 
| 1 | 
0.5 0.5  | 
YES | 
| 2 | 
-0.5 -0.5  | 
NO |