# 667. Beautiful Arrangement II LeetCode Solution | Easy Approach

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Beautiful Arrangement II Given two integers `n` and `k`, construct a list `answer` that contains `n` different positive integers ranging from `1` to `n` and obeys the following requirement:

• Suppose this list is `answer = [a1, a2, a3, ... , an]`, then the list `[|a1 - a2|, |a2 - a3|, |a3 - a4|, ... , |an-1 - an|]` has exactly `k` distinct integers.

Return the list `answer`. If there multiple valid answers, return 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.
```

Constraints:

• `1 <= k < n <= 104`

Time: O(n)
Space: O(n)

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