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.
Make a checkerboard matrix
Doubling elements in a vector
Area of an Isoceles Triangle
Sum of series
The Tortoise and the Hare - 02
Check Digit - 01
remove numbers from a string
Last Digit of fibonacci number
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