        <a class="dropdown-item" href="../19-hashing-2/index.html">  19.  2/18 Hashing, Part II </a>
                
                  <a class="dropdown-item" href="../20-linked-lists-1/index.html">  20.  2/23 Linked Lists, Part I </a>
                
                  <a class="dropdown-item" href="../21-linked-lists-2/index.html">  21.  2/25 Linked Lists, Part II </a>
                
                  <a class="dropdown-item" href="../22-bsts-1/index.html">  22.  2/28 Binary Search Trees, Part I </a>
