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Must achieve = 99% accuracy on 10,000 random test pairs (held-out, fixed seed)
。关于这个话题，safew官方下载提供了深入分析
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.
tags = [self._extract_text(tag) for tag in soup.select(".tags a")]，推荐阅读搜狗输入法2026获取更多信息
"discountType": "%",，更多细节参见91视频
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