1. 建堆：将数组构建成大顶堆（父节点 = 子节点）
Apple's mobile devices are secure enough for NATO. Following extensive testing by the German government, the iPhone and iPad are now considered secure enough for the NATO-restricted classified level.
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李 “나와 애들 추억묻은 애착인형 같은 집…돈 때문에 판 것 아냐”，更多细节参见51吃瓜
But some users remain concerned about the platform's approach.