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.
Who is Emil Michael?
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The trust said it was one of a number of "innovative, nature-based solutions to protect Northey Island against rising sea levels and the rapid loss of saltmarsh".
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* @param {ListNode} head 链表的头节点
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