The algorithm maintains a running "best distance" that starts at infinity. As it walks the tree, it checks each visited point and updates the best distance if it finds something closer. Before recursing into a child node, it checks whether the closest possible point in that child's bounding box is farther than the current best. If so, the entire subtree gets pruned.
从目前的消息来看，有两台来自 OV 的机型会很快来到我们面前——OPPO Find N6 与 vivo X300 Ultra。
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const sp = speed[i];
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In less than 25 years this will rise to more than half of the rail network being at risk, according to the government's own figures.