Problem 1459. Triangular Tiling Dots in a Circle

Created by Yaroslav in Community

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

64.0% Correct | 36.0% Incorrect
Last solution submitted on Apr 30, 2019