* 时间O(n) 空间O(n)（理论最优，无冗余计算/存储）
但三星并不是第一家在手机上直接集成防窥屏硬件的厂商，夏普从 LCD 翻盖机时代就已经搭载了类似的技术，一直到 Aqous 时代都有延续：
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Responding to questions as to why costs were allowed to spiral for so long, an NHS spokesperson said the length of time it takes public sector organisations to procure contracts "can vary", and the nature of the contract was "complex".，推荐阅读服务器推荐获取更多信息
You can ask for specific details or for an overview of messages.，这一点在heLLoword翻译官方下载中也有详细论述