<p>Given two integers representing the <code>numerator</code> and <code>denominator</code> of a fraction, return <em>the fraction in string format</em>.</p>

<p>If the fractional part is repeating, enclose the repeating part in parentheses.</p>

<p>If multiple answers are possible, return <strong>any of them</strong>.</p>

<p>It is <strong>guaranteed</strong> that the length of the answer string is less than <code>10<sup>4</sup></code> for all the given inputs.</p>

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

<pre>
<strong>Input:</strong> numerator = 1, denominator = 2
<strong>Output:</strong> &quot;0.5&quot;
</pre>

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

<pre>
<strong>Input:</strong> numerator = 2, denominator = 1
<strong>Output:</strong> &quot;2&quot;
</pre>

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

<pre>
<strong>Input:</strong> numerator = 4, denominator = 333
<strong>Output:</strong> &quot;0.(012)&quot;
</pre>

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

<ul>
	<li><code>-2<sup>31</sup> &lt;=&nbsp;numerator, denominator &lt;= 2<sup>31</sup> - 1</code></li>
	<li><code>denominator != 0</code></li>
</ul>

class Solution {
public:
    string fractionToDecimal(int numerator, int denominator) {
        if(!numerator) return "0";
        string ans = "";
        if (numerator > 0 ^ denominator > 0) ans += '-';
        long num = labs(numerator), den = labs(denominator);
        long q = num / den;
        long r = num % den;
        ans += to_string(q);
        
        if(r == 0) return ans;
        
        ans += '.';
        unordered_map<long, int> mp;
        while(r != 0){
            if(mp.find(r) != mp.end()){
                int pos = mp[r];
                ans.insert(pos, "(");
                ans += ')';
                break;
            }
            else{
                mp[r] = ans.length();
                r *= 10;
                q = r / den;
                r = r % den;
                ans += to_string(q);
            }
        }
        return ans;
    }
};
9100