Manhattan Distance

已知两点$A\left(a_{1},a_{2},\ldots,a_{n}\right)$和$B\left(b_{1},b_{2},\ldots,b_{n}\right)$，则两者之间的曼哈顿距离为：

$$d=\sum_{i=1}^{n}{\left|a_{i}-b_{i}\right|}$$