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.
面对海南自由贸易港即将实施封关运作，习近平总书记叮嘱：“脚要踩在大地上。我们干任何事情都有内在规律。要科学有序安排开放节奏和进度，稳扎稳打、步步为营，力求‘放得活’又‘管得好’。”
，详情可参考WPS下载最新地址
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The firm said the job cuts should deliver annual savings of around £40m and did not specify when the job cuts would be implemented, but said most of the savings would be made this year.
Eleanor LawsonWest Midlands