Games and physics simulations need to detect which objects are touching or overlapping. With nnn objects, checking every pair is O(n2)O(n^2)O(n2) comparisons, which gets expensive fast. A hundred objects means roughly 5,000 pair checks. A thousand means nearly 500,000.
我买东西，有选择困难症。看中的东西，不能马上下单，跟冬截然相反。这个事我反复想过，也属于早期创伤。生病后，我的选择困难症明显减轻了。扁鹊说，不治有病，治未病。这句话听着别扭，未病你治啥？其实他的意思是，病就是个标签。打个喷嚏流个鼻涕就大惊小怪，那根本不叫病。天下本没有病，说的人多了，就真有了病。我不爱吃药，裹着蜜的大药丸子偶尔吃几个，不为治病，为好吃。，更多细节参见safew官方下载
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Security patches are updated to Jan 2026.