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.
合规性要求越来越严格，GDPR等法规的实施对企业提出了更高的要求。
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"That's almost 40% of the Danish emission reduction target. So that's quite impactful," says Gade.
Donna Lu is an assistant editor, climate, environment and science at Guardian Australia
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Our photographer shares his favourite images from the Games in Italy