The device has a Privacy Display that’s said to be the first of its kind on a smartphone. The idea here is to prevent people around from seeing what’s on the screen from acute angles. There's a small decrease in brightness when Privacy Display is active, and there are lots of customization options.
* 核心思路：找初始无序边界 + 计算区间最值 + 扩展边界。关于这个话题，heLLoword翻译官方下载提供了深入分析
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