Largest Number
<p>Given a list of non-negative integers <code>nums</code>, arrange them such that they form the largest number and return it.</p>

<p>Since the result may be very large, so you need to return a string instead of an integer.</p>

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

<pre>
<strong>Input:</strong> nums = [10,2]
<strong>Output:</strong> &quot;210&quot;
</pre>

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

<pre>
<strong>Input:</strong> nums = [3,30,34,5,9]
<strong>Output:</strong> &quot;9534330&quot;
</pre>

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

<ul>
	<li><code>1 &lt;= nums.length &lt;= 100</code></li>
	<li><code>0 &lt;= nums[i] &lt;= 10<sup>9</sup></code></li>
</ul>
Greedy; Array; String; Sorting
func largestNumber(nums []int) string {
	vs := make([]string, len(nums))
	for i, v := range nums {
		vs[i] = strconv.Itoa(v)
	}
	sort.Slice(vs, func(i, j int) bool {
		return vs[i]+vs[j] > vs[j]+vs[i]
	})
	if vs[0] == "0" {
		return "0"
	}
	return strings.Join(vs, "")
}