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.
Times 2 - START HERE
Back to basics 1 - Saving
Back to basics 12 - Input Arguments
Reverse the elements of an array
Vectors counting by 2
Sub-sequence - 03
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