Two circles
Easy
Execution time limit is 1 second
Runtime memory usage limit is 64 megabytes
Determine at how many points two circles intersect.
Input
6 numbers , , , , , , where , , , are the coordinates of the centers of the circles, , are their radii.
All numbers are real, do not exceed modulo, and are specified with no more than decimal places.
Output
Output a single number, the number of intersection points. If the number of points is infinite, output .
Examples
Input #1
Answer #1
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