与两年前不同，这辆无人驾驶出租车的驾驶座上，不再有监督员。驾驶过程中，方向盘自顾自地旋转，礼让行人，保持车距，转弯减速让行，文明得令人汗颜。稍有不太便捷之处，则是在落客时，车辆只能生硬地停靠在地图上约定的地点，乘客难以跟其“商量”能否停靠在更方便的落客区。
I was days into my research before I finally found a clue. In an obscure document on the website of the International House of Pancakes Corporation there was a hint that the dark breakfast had been made. IHOP omelettes include pancake batter. While I cannot place IHOP omelettes exactly on the map, by interpolating between pancakes and omelettes, we can bound where they must occur, and confirm that the manifold possibilities do indeed pass through the Dark Breakfast Abyss.
，这一点在雷电模拟器官方版本下载中也有详细论述
const lines = [];，更多细节参见safew官方下载
Former US F-35 fighter pilot arrested for training Chinese air force
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）。