// 易错点5：忘记push当前索引 → 后续价格无法找到正确的上一个更大值，结果全错
Last Hours: Save up to $680 on your pass before 11:59 p.m. tonight.，这一点在WPS下载最新地址中也有详细论述
Synchronous fast paths matter，这一点在爱思助手下载最新版本中也有详细论述
for (int i = 1; i < 10; i++) {
Shortcuts: For common scenarios, we pre-calculate the travel time/distance (the "shortcut") between border points within the same cluster and also to border points of immediately adjacent clusters.