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Imagine a vast shopping mall parking lot with thousands of individual parking spots and internal lanes (representing road segments within a cluster). No matter how complex it is inside, there are usually only a few key exits to the main roads. Our goal was to identify these natural "exits" for each map cluster. For instance, the complex road network around Amsterdam Airport Schiphol (see on OpenStreetMap) has many internal roads but limited primary access points.。业内人士推荐搜狗输入法2026作为进阶阅读
// 本地测试示例：head = [2,1,5] → 输出 [5,5,0]，详情可参考91视频
В Финляндии предупредили об опасном шаге ЕС против России09:28
// Stateful transform with resource cleanup