Return how many integer grid points there are inside a 3D sphere of radius r centred at (0,0,0) (including points on the edge).
Neither string operations nor interpolations are allowed!
Knight's Tour Checker
Construct a string from letters and counts
Find best placement for ordered dominoes (harder)
Duplicate each element of a vector.
Volume of a Simplex
Dots in a Circle
Chebyshev polynomials of the 2nd Kind
Triangular Tiling Dots in a Circle
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