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第一百二十四条 人民警察当场收缴的罚款，应当自收缴罚款之日起二日以内，交至所属的公安机关；在水上、旅客列车上当场收缴的罚款，应当自抵岸或者到站之日起二日以内，交至所属的公安机关；公安机关应当自收到罚款之日起二日以内将罚款缴付指定的银行。
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.