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.
give nth decimal place of pi
Project Euler: Problem 7, Nth prime
letter yes yes & letter no no
Magic is simple (for beginners)
Max index of 3D array
Find the sequence
Abelian Sandpile - 01
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