习题链接：LeetCode 581. 最短无序连续子数组
Some ergonomic keyboards come with permanent or removable wrist or palm rests, which can be cushioned or hard. This is another area where opinions diverge: proponents claim they help you maintain a neutral hand position, while detractors say they put pressure on the tendons and can cause wrist pain or even exacerbate conditions like carpal tunnel. Ideally, your palms should be resting, not your wrists, and you might find you like having that support or you may find the pressure uncomfortable.，这一点在夫子中也有详细论述
Comparison between error-diffusion and ordered dithering using an 8-colour regular palette. Left to right: error-diffusion, ordered.，详情可参考一键获取谷歌浏览器下载
// 步骤1：计算每辆车的到达时间（精确浮点数，禁止取整！）