* 时间复杂度：O(n log n)（主要来自排序），空间复杂度：O(n)
Stream.pull() creates a lazy pipeline. The compress and encrypt transforms don't run until you start iterating output. Each iteration pulls data through the pipeline on demand.。91视频对此有专业解读
Discord is rolling out facial scanning and ID checks globally in March for users who don't want to be locked into a 'teen-appropriate experience'，这一点在51吃瓜中也有详细论述
// 测试用例验证（全覆盖核心场景）