Find N Unique Integers Sum up to Zero
<p>Given an integer <code>n</code>, return <strong>any</strong> array containing <code>n</code> <strong>unique</strong> integers such that they add up to <code>0</code>.</p>

<p>&nbsp;</p>
<p><strong class="example">Example 1:</strong></p>

<pre>
<strong>Input:</strong> n = 5
<strong>Output:</strong> [-7,-1,1,3,4]
<strong>Explanation:</strong> These arrays also are accepted [-5,-1,1,2,3] , [-3,-1,2,-2,4].
</pre>

<p><strong class="example">Example 2:</strong></p>

<pre>
<strong>Input:</strong> n = 3
<strong>Output:</strong> [-1,0,1]
</pre>

<p><strong class="example">Example 3:</strong></p>

<pre>
<strong>Input:</strong> n = 1
<strong>Output:</strong> [0]
</pre>

<p>&nbsp;</p>
<p><strong>Constraints:</strong></p>

<ul>
	<li><code>1 &lt;= n &lt;= 1000</code></li>
</ul>
Array; Math
func sumZero(n int) []int {
	ans := make([]int, n)
	for i, j := 1, 0; i <= n/2; i, j = i+1, j+1 {
		ans[j] = i
		j++
		ans[j] = -i
	}
	return ans
}