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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Both are good which one do you like let me know in the comment.
5年过渡，我国圆满完成巩固拓展脱贫攻坚成果同乡村振兴有效衔接目标任务，牢牢守住了不发生规模性返贫致贫底线。