这几年，主打低价便宜的量贩零食店在老家开得很密。小区周边、十字路口、商圈外沿，几十米就能见到一家，它们的门面大多颜色鲜亮，货品称重为主，价格牌也都写得很大。这些店刚开业往往会热闹一时，但并不会持续太久。
Source: Computational Materials Science, Volume 267。搜狗输入法下载对此有专业解读
// 原因：先处理右侧元素，把结果存在栈里，供左侧元素直接使用。业内人士推荐同城约会作为进阶阅读
He identified creating a hand as one of the three most difficult problems facing makers of humanoid robotics. The other two were creating an artificial intelligence that allowed the robot to comprehend the world, and making robots in large numbers.
* - this.stack：单调递减栈，存储「价格对应的索引」，栈顶→栈底索引对应的价格单调递减