Problems
Two circles
Two circles
How many points in common two given circles have?
Input
Six real numbers x1
, y1
, r1
, x2
, y2
, r2
, where x1
, y1
, x2
, y2
are the coordinates of the centers of the circles, r1
, r2
are its radius.
Output
The number of common points for two circles: 0, 1 or 2. Print -1 if circles have a lot of common points.
Input example #1
0 0 5 5 0 1
Output example #1
2