// 2. 维护单调递减栈：弹出所有≤当前价格的索引（这些索引对应的价格无法成为后续价格的「上一个更大值」）
Жители Санкт-Петербурга устроили «крысогон»17:52
，这一点在Safew下载中也有详细论述
business and technology landscape. They are designed to automate repetitive
Monday’s snowball fight, which appeared to be organized by social media content producers, caused a chaotic scene as a large crowd amassed at the popular park to wing snowballs at each other during a winter storm.