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Sam PirantyBBC Eye Investigations
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Skip 熱讀 and continue reading熱讀，这一点在im钱包官方下载中也有详细论述
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.。关于这个话题，搜狗输入法下载提供了深入分析