a post with pseudo code

This is an example post with some pseudo code rendered by pseudocode (https://github.com/SaswatPadhi/pseudocode.js). The example presented here is the same as the one in the pseudocode.js (https://saswat.padhi.me/pseudocode.js/) documentation, with only one simple but important change: everytime you would use $, you should use $$ instead. Also, note that the pseudocode key in the front matter is set to true to enable the rendering of pseudo code. As an example, using this code:

```pseudocode
% This quicksort algorithm is extracted from Chapter 7, Introduction to Algorithms (3rd edition)
\begin{algorithm}
\caption{Quicksort}
\begin{algorithmic}
\PROCEDURE{Quicksort}{$$A, p, r$$}
    \IF{$$p < r$$}
        \STATE $$q = $$ \CALL{Partition}{$$A, p, r$$}
        \STATE \CALL{Quicksort}{$$A, p, q - 1$$}
        \STATE \CALL{Quicksort}{$$A, q + 1, r$$}
    \ENDIF
\ENDPROCEDURE
\PROCEDURE{Partition}{$$A, p, r$$}
    \STATE $$x = A[r]$$
    \STATE $$i = p - 1$$
    \FOR{$$j = p$$ \TO $$r - 1$$}
        \IF{$$A[j] < x$$}
            \STATE $$i = i + 1$$
            \STATE exchange
            $$A[i]$$ with $$A[j]$$
        \ENDIF
        \STATE exchange $$A[i]$$ with $$A[r]$$
    \ENDFOR
\ENDPROCEDURE
\end{algorithmic}
\end{algorithm}
```

Generates:

% This quicksort algorithm is extracted from Chapter 7, Introduction to Algorithms (3rd edition)
\begin{algorithm}
\caption{Quicksort}
\begin{algorithmic}
\PROCEDURE{Quicksort}{$$A, p, r$$}
    \IF{$$p < r$$}
        \STATE $$q = $$ \CALL{Partition}{$$A, p, r$$}
        \STATE \CALL{Quicksort}{$$A, p, q - 1$$}
        \STATE \CALL{Quicksort}{$$A, q + 1, r$$}
    \ENDIF
\ENDPROCEDURE
\PROCEDURE{Partition}{$$A, p, r$$}
    \STATE $$x = A[r]$$
    \STATE $$i = p - 1$$
    \FOR{$$j = p$$ \TO $$r - 1$$}
        \IF{$$A[j] < x$$}
            \STATE $$i = i + 1$$
            \STATE exchange
            $$A[i]$$ with $$A[j]$$
        \ENDIF
        \STATE exchange $$A[i]$$ with $$A[r]$$
    \ENDFOR
\ENDPROCEDURE
\end{algorithmic}
\end{algorithm}