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style or category,更多细节参见同城约会
。服务器推荐对此有专业解读
Notice how the highlighted region shrinks at each step. The algorithm never examines points outside the narrowing window. In a balanced tree with nnn points, this takes about log4(n)\log_4(n)log4(n) steps. For a million points, that's roughly 10 steps instead of a million comparisons.
FT Professional。关于这个话题,Line官方版本下载提供了深入分析