tour of one of the most flexible and important data structures in computer science: graphs!</p>
<p>Graphs are node-based structures (or "linked structures"), and they should look somewhat familiar already from our explorations of linked lists and trees earlier this quarter. Some key distinctions here are:</p>
<ul>
<li>Graphs don't necessarily have just one primary entry point. Compare this to the presence of a head node in every linked list and the presence of a root node in every tree.</li>
</ul>
<ul>
<li>