Problem 1459. Triangular Tiling Dots in a Circle

Return how many Triangular Tiling grid points there are inside a circle of radius r centred at (0,0) (including points on the edge).

Assume that a Triangular Tiling grid is a 2D Hexagonal Bravais lattice with | a1 | = | a2 | = 1 and φ = 120°.

Neither string operations nor interpolations are allowed!

Solution Stats

60.0% Correct | 40.0% Incorrect
Last solution submitted on May 14, 2015
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