Given two integers
n and k, you need to construct a list which contains n different positive integers ranging from 1 to n and obeys the following requirement:
Suppose this list is [a1, a2, a3, ... , an], then the list [|a1 - a2|, |a2 - a3|, |a3 - a4|, ... , |an-1 - an|] has exactly k distinct integers.
If there are multiple answers, print any of them.
Example 1:
Input: n = 3, k = 1 Output: [1, 2, 3] Explanation: The [1, 2, 3] has three different positive integers ranging from 1 to 3, and the [1, 1] has exactly 1 distinct integer: 1.
Example 2:
Input: n = 3, k = 2 Output: [1, 3, 2] Explanation: The [1, 3, 2] has three different positive integers ranging from 1 to 3, and the [2, 1] has exactly 2 distinct integers: 1 and 2.
Note:
- The
nandkare in the range 1 <= k < n <= 104.
/*** @param {number} n* @param {number} k* @return {number[]}*/var constructArray = function (n, k) {let res = [];for (let i = 1, j = n; i <= j;) {if (k > 1) {res.push(k-- % 2 ? i++ : j--);} else {res.push(i++);}}return res;};let n = 3;let k = 2;let res = constructArray(n, k);console.log(res);