Efficient Data structure which supports search on 2 keys of Node
<p>Suppose I have my node structure as:</p>

<pre><code>struct Employee
{
int age;
int salary;
string title;
...
}
</code></pre>

<p>I wanted an efficient data structure by which I can do search query based on age as well as salary.
Can somebody suggest me some god data structure for that.</p>
