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.
陈阳说：“做不好本职工作、守不住检测数据，替行业发声也叫不响。”她在手机里存着台风过后的现场图，那些散落的网箱、沉默的养殖户时刻提醒她，要努力把养殖户“怎么扛过去”的担忧变为政策措施实实在在的保障。
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