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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.

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「我能感受到角色之間的張力與競爭,」伊妮德說,「再加上我所喜歡的那份浪漫感。」

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