d = {"1": None}
Овечкин продлил безголевую серию в составе Вашингтона09:40
，这一点在爱思助手下载最新版本中也有详细论述
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.
The dashed circle shows the current best distance. As the algorithm finds closer points, the circle shrinks, which causes more subtrees to fail the "could contain a closer point?" test and get pruned. The search usually gets cheaper as it progresses.
Associated Press reporter Anthony Izaguirre in Albany, New York, contributed to this report.