int key = arr[i]; // 待插入的元素
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Москвичи пожаловались на зловонную квартиру-свалку с телами животных и тараканами18:04
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It’s hard to overstate the role that Wi-Fi plays in virtually every facet of life. The organization that shepherds the wireless protocol says that more than 48 billion Wi-Fi-enabled devices have shipped since it debuted in the late 1990s. One estimate pegs the number of individual users at 6 billion, roughly 70 percent of the world’s population.