1 & x_2 & x_2^2 & \dots & x_2^{n-1}\\
Вячеслав Агапов
，这一点在safew官方版本下载中也有详细论述
Tiny Footprint: Our HH-Routing data adds only 0.5% to 1% to OsmAnd's already incredibly compact map sizes. The entire planet's car routing data is around 800MB!
路由的内部实现：缓存 + 懒加载