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 relatively common elements in matrix rows
Given a 4x4 matrix, swap the two middle columns
Sum of series III
Is it really a 5?
Fault in our Stars - 02
Don't be Greedy!
Game of life - 02
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