lectures/18-ethics/index.html">  18.  2/16 Applied Ethics </a>
                
                  <a class="dropdown-item" href="../lectures/19-hashing-2/index.html">  19.  2/18 Hashing, Part II </a>
                
                  <a class="dropdown-item" href="../lectures/20-linked-lists-1/index.html">  20.  2/23 Linked Lists, Part I </a>
                
                  <a class="dropdown-item" href="../lectures/21-linked-lists-2/index.html">  21.  2/25 Linked Lists, Part II </a>
                
  