I was present and unfortunately didn&#x27;t understand the lecture till I looked up <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Huffman_coding" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Huffman_coding</a> halfway through.  It was very interesting after that point though!