Fizz Buzz
<p>Given an integer <code>n</code>, return <em>a string array </em><code>answer</code><em> (<strong>1-indexed</strong>) where</em>:</p>

<ul>
	<li><code>answer[i] == &quot;FizzBuzz&quot;</code> if <code>i</code> is divisible by <code>3</code> and <code>5</code>.</li>
	<li><code>answer[i] == &quot;Fizz&quot;</code> if <code>i</code> is divisible by <code>3</code>.</li>
	<li><code>answer[i] == &quot;Buzz&quot;</code> if <code>i</code> is divisible by <code>5</code>.</li>
	<li><code>answer[i] == i</code> (as a string) if none of the above conditions are true.</li>
</ul>

<p>&nbsp;</p>
<p><strong class="example">Example 1:</strong></p>
<pre><strong>Input:</strong> n = 3
<strong>Output:</strong> ["1","2","Fizz"]
</pre><p><strong class="example">Example 2:</strong></p>
<pre><strong>Input:</strong> n = 5
<strong>Output:</strong> ["1","2","Fizz","4","Buzz"]
</pre><p><strong class="example">Example 3:</strong></p>
<pre><strong>Input:</strong> n = 15
<strong>Output:</strong> ["1","2","Fizz","4","Buzz","Fizz","7","8","Fizz","Buzz","11","Fizz","13","14","FizzBuzz"]
</pre>
<p>&nbsp;</p>
<p><strong>Constraints:</strong></p>

<ul>
	<li><code>1 &lt;= n &lt;= 10<sup>4</sup></code></li>
</ul>
Math; String; Simulation
class Solution {
    public List<String> fizzBuzz(int n) {
        List<String> ans = new ArrayList<>();
        for (int i = 1; i <= n; ++i) {
            String s = "";
            if (i % 3 == 0) {
                s += "Fizz";
            }
            if (i % 5 == 0) {
                s += "Buzz";
            }
            if (s.length() == 0) {
                s += i;
            }
            ans.add(s);
        }
        return ans;
    }
}