Data container for fast lookup and retrieval
<p>Actually I need a data structure that helps me in reducing time for look-ups and retrieval of values of the respective keys.</p>

<p>Right now I am using a map container with key as structure and want to retrieve its values as fast as possible. </p>

<p>I am using gcc on fedora 12. I tried unordered map also, but it is not working with my compiler.</p>

<p>Also, Hash map is not available in namespace <code>std</code>.</p>
