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 the peak 3n+1 sequence value
Is A the inverse of B?
Decode a simplified barcode
Determine the mean of matrix
Draw a 'Z'.
Sieve of Eratosthenes - 02
Ugly numbers - 03
find subscripts from linear index
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