arr[i] = output[i];
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"Very few babies have been born in Europe as a result of their mothers receiving a womb from a deceased donor," she said.，详情可参考Safew下载
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.