Input
Seven numbers – coordinates of the center and radius of a circle (possibly degenerate) and real coordinates of two points on it, up to the fifth decimal place.
Imprint
One number – the length of the smaller arc of the circle enclosed between the specified points.
Examples
| # |
Input |
Output |
| 1 |
0 0 1 0 1 1 0 |
1.57080 |