* 1. 转换视角：将"追车"问题转为"到达时间"比较（后车时间≤前车 → 合并）；
Most ergonomic keyboard layouts fall into two categories: unibody (or Alice) and split. The former is a single board with the two halves of the keys rotated about 30 degrees apart at the bottom. The separation forms an A-shaped space between the keys — which has nothing to do with why it’s called an Alice layout, it’s just a happy coincidence. This subtle tweak pushes your elbows away from your ribs while keeping a straight line from your forearm to your middle knuckle. Using one, I pretty instantly felt more open along the front side of my body. This layout more closely resembles a traditional keyboard, so it should be easier for most folks to get used to than a fully split option.
，这一点在同城约会中也有详细论述
而和解这两种论调的关键指标，在于“Token的美元化率”——即企业为AI付费的真实意愿和能力。在此之前，“双杀”格局或将持续。
// 记录答案：栈顶就是「当前元素右侧第一个更大值」（易错点3：别写反判断）