LeetCode: Beautiful Arrangement II Solution

1/**
2 * @param {number} n
3 * @param {number} k
4 * @return {number[]}
5 */
6var constructArray = function (n, k) {
7 const res = []
8 let from = 1
9 let to = k + 1
10
11 while (from <= to) {
12 res.push(from++)
13 from <= to && res.push(to--)
14 }
15 for (let i = k + 2; i <= n; i++) {
16 res.push(i)
17 }
18
19 return res
20}

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