<p><strong>HTML entity parser</strong> is the parser that takes HTML code as input and replace all the entities of the special characters by the characters itself.</p>

<p>The special characters and their entities for HTML are:</p>

<ul>
	<li><strong>Quotation Mark:</strong> the entity is <code>&amp;quot;</code> and symbol character is <code>&quot;</code>.</li>
	<li><strong>Single Quote Mark:</strong> the entity is <code>&amp;apos;</code> and symbol character is <code>&#39;</code>.</li>
	<li><strong>Ampersand:</strong> the entity is <code>&amp;amp;</code> and symbol character is <code>&amp;</code>.</li>
	<li><strong>Greater Than Sign:</strong> the entity is <code>&amp;gt;</code> and symbol character is <code>&gt;</code>.</li>
	<li><strong>Less Than Sign:</strong> the entity is <code>&amp;lt;</code> and symbol character is <code>&lt;</code>.</li>
	<li><strong>Slash:</strong> the entity is <code>&amp;frasl;</code> and symbol character is <code>/</code>.</li>
</ul>

<p>Given the input <code>text</code> string to the HTML parser, you have to implement the entity parser.</p>

<p>Return <em>the text after replacing the entities by the special characters</em>.</p>

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

<pre>
<strong>Input:</strong> text = &quot;&amp;amp; is an HTML entity but &amp;ambassador; is not.&quot;
<strong>Output:</strong> &quot;&amp; is an HTML entity but &amp;ambassador; is not.&quot;
<strong>Explanation:</strong> The parser will replace the &amp;amp; entity by &amp;
</pre>

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

<pre>
<strong>Input:</strong> text = &quot;and I quote: &amp;quot;...&amp;quot;&quot;
<strong>Output:</strong> &quot;and I quote: \&quot;...\&quot;&quot;
</pre>

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

<ul>
	<li><code>1 &lt;= text.length &lt;= 10<sup>5</sup></code></li>
	<li>The string may contain any possible characters out of all the 256 ASCII characters.</li>
</ul>

class Solution {
public:
    string entityParser(string text) {
        map<string,char> hashmap = {
            {"&quot;", '\"'},
            {"&apos;", '\''},
            {"&amp;",'&'},
            {"&gt;", '>'},
            {"&lt;",'<'},
            {"&frasl;", '/'}
        };
        vector<string> s;
        text+=" ";
        string temp = "";
        for (int i = 0; i< text.size(); i++) {
            char c = text[i];
            if (c != ' ' && c!= ';' && c != '&') temp+=c;
            else if (c == '&') {
                s.push_back(temp);
                temp=c;
            }
            else if (c == ';') {
                temp+=c;
                s.push_back(temp);
                temp = "";
            } else if (c == ' ') {
                if (temp != "")
                    s.push_back(temp);
                temp = "";
                while(text[i] == ' ' && i+1 < text.size()) {
                    
                    c = text[i];
                    temp+=c;
                    i++;
                    
                }
                if (text[i]!=' ') i--;
                s.push_back(temp);
                temp = "";
            }
        }
        string ans = "";
        for (string &c:s) {
            if (hashmap.find(c) != hashmap.end()) c = hashmap[c];
            ans += c;
        }
        return ans;
    }

};


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