The problem is asking for tangent circles.
Problem with the third test suite
in 3rd case,
they intersect at two points.
In geometry, tangent circles (also known as kissing circles) are circles that intersect in a single point.
Increment a number, given its digits
Will there be a new leader?
Solving Quadratic Equations (Version 1)
Rotate Matrix @180 degree
Generate Golomb's sequence
Queen's move - 02
Repeat elements of a vector
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