Problems
The position of points outside the line
The position of points outside the line
Find the relative position of two points and the line Ax + By + C = 0.
Input
Seven numbers - the coordinates of two points and the coefficients A, B, C of the line equation.
Output
Print "YES", if the points lie on one side from the line and "NO" otherwise.
Input example #1
0 0 2 4 2 -1 -1
Output example #1
YES