一道数学题, 知识点是: 曼哈顿距离.
/**
* @param {number[]} arr1
* @param {number[]} arr2
* @return {number}
*/
const maxAbsValExpr = function(arr1, arr2) {
const da = [[1, 1], [1, -1], [-1, 1], [-1, -1]]; // 代表了四种情况
let r = 0;
for (const d of da) {
let [max, min] = [0, 40000];
const [x, y] = d;
for (let i = 0; i < arr1.length; i++) {
max = Math.max(max, x * arr1[i] + y * arr2[i] + i);
min = Math.min(min, x * arr1[i] + y * arr2[i] + i);
}
r = Math.max(r, max - min)
}
return r;
};