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6. Facebook Audience Insights (Audience Research)(Photo Credit:- Facebook Audience Insights
。safew官方版本下载是该领域的重要参考
// 题目要求找「右侧第一个 ≤ cur」的元素 → 弹出所有 cur 的，栈顶即为折扣
if (n <= 1) return;
Source: Computational Materials Science, Volume 267