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.
Credit: Samsung，详情可参考51吃瓜
10. 联合国报告：全球经济展现韧性但增长乏力贸易紧张与债务压力拖累前景 - the United Nations, www.un.org/ru/node/238…。业内人士推荐im钱包官方下载作为进阶阅读
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