（本报记者赵成、吴丹、朱隽、王昊男、侯琳良、杨文明、王云娜、刘军国、李心萍、寇江泽、李林蔚、常钦、刘新吾、郑洋洋、李俊杰）
Looking at the wider picture, however, mandatory age verification appears to be a growing trend. The UK government's current implementation under the Online Safety Act has come under heavy fire for privacy concerns, while platforms like Discord have received similar critique for their face-scanning age verification efforts, not least because of associations with companies that may not be using the collected data for mere age-confirmation purposes.，详情可参考同城约会
，这一点在91视频中也有详细论述
// We've been tampered with. Refuse to play.
If you are not in the UK, watch on YouTube or listen to the World of Secrets podcast here。safew官方版本下载是该领域的重要参考
思路：找「右侧第一个 ≤ cur」的元素 → 弹出所有 cur 的元素，栈顶即为折扣。最终价格 = cur - 折扣（有则）或 cur（无则）。