This problem is looking for the number of vertices on the hexagonal grid inside the circle of radius r. The center of the hexagon is not counted as a point for this problem, and this is true for every hexagon inside the circle.
Remove the polynomials that have positive real elements of their roots.
Calculate the Levenshtein distance between two strings
Getting logical indexes
Find the nearest integer
Length of the hypotenuse
Triangular Tiling Dots in a Circle
Dots in a Sphere
Chebyshev polynomials of the 1st Kind
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