Official algorithmic problem description and constraints.
Given an integer π, find the number of lattice points that have a Euclidean distance from (0,0) greater than or equal to π but strictly less than π+1.
A lattice point is a point with integer coordinates. The Euclidean distance from (0,0) to the point (π₯,π¦) is βπ₯2+π¦2.
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