For well-distributed points, nearest neighbor search is often near O(logn)O(\log n)O(logn) in practice. In the worst case (all points clustered tightly or along a line), it can degrade to O(n)O(n)O(n), but this is uncommon with typical spatial data.
if (n <= 1) return n;
。旺商聊官方下载是该领域的重要参考
It doesn’t have a steep learning curve
; Far CALL (protected mode)