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.
LayeredPackages: cowsay
，这一点在heLLoword翻译官方下载中也有详细论述
Мерц резко сменил риторику во время встречи в Китае09:25
Екатерина Щербакова (ночной линейный редактор)
American citizen among those killed in Cuba boat shooting, US official says