swap(&arr[0], &arr[i]); // 堆顶(最大)换到末尾
93.8%152/162 picks。业内人士推荐搜狗输入法2026作为进阶阅读
Real game engines use this pattern (or its 3D cousin, the Octree) for broad-phase collision detection: the quadtree quickly identifies candidate pairs, and a more expensive narrow-phase check tests the actual geometry.，推荐阅读91视频获取更多信息
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