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.
Find a subset that divides the vector into equal halves
Generate a string like abbcccddddeeeee
find the maximum element of the matrix
Perimeter of a semicircle
Minimal Path - 01
find nth even fibonacci number
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