y = cos x#2030
Determine whether the point , given by coordinates (x_0, y_0), belongs to the region of the plane bounded by the segment of the -axis from to and the cosine curve y = \cos x.
A single line contains the coordinates of the point (x_0, y_0). The absolute values of the coordinates do not exceed .
Print a single line: YES if the point belongs to the specified region, NO if it does not, or ON BORDER if the point lies on the border of the region. For this task, consider the point to be on the border if, at the same abscissa, the distance from it to any boundary line along the ordinate axis does not exceed , or at the same ordinate, the distance from the point to any boundary line along the abscissa axis also does not exceed .
Example 1