\begin{frame}
  \frametitle{Algorithm}
  \begin{columns}
    \begin{column}{0.6\textwidth}
  \begin{algorithm}[H]\caption{Square Matrix Multiplication}
    \setlength{\lineskip}{7pt}
    \begin{algorithmic}[1]
      \Function{MM}{$\textbf{A}, \textbf{B}, \textbf{C}$}
      \State $sum \gets 0$
      \State $n \gets columns(\textbf{A}) == rows(\textbf{B})$
      \State $m \gets rows(\textbf{A})$
      \State $p \gets columns(\textbf{B})$

        \For{$i = 0,1,2 \dots,m-1$}
        \For{$j = 0,1,2 \dots,p-1$}
        \State $sum \gets 0$
        \For{$k = 0,1,2 \dots,n-1$}
          \State $sum \gets  sum + \textbf{A}[i][k] \cdot \textbf{B}[k][j]$
        \EndFor
        \State $\textbf{C}[i][j] \gets  sum $
        \EndFor
        \EndFor
        \State \textbf{return} $\textbf{C}$
     \EndFunction
    \end{algorithmic}
  \end{algorithm}
\end{column}
\begin{column}{0.4\textwidth}
  \scalebox{0.6}{\parbox{\linewidth}{

  \begin{tikzpicture}[ampersand replacement=\&,remember picture,overlay]

    \matrix (A)[matrix of math nodes, label skeleton, left delimiter=[,right delimiter={]}] at (2,-2.8)
     {
     A_{1,1} \& \cdots \& A_{1,k} \& \cdots \& A_{1,n} \\
     \vdots \&  \& \vdots \&  \& \vdots \\
     A_{i,1} \& \cdots \& A_{i,k} \& \cdots \& A_{i,n} \\
     \vdots \&  \& \vdots \& \& \vdots \\
     A_{m,1} \& \cdots \& A_{m,k} \& \cdots \& A_{m,n} \\
     };

     \matrix (B)[matrix of math nodes, label skeleton, left delimiter=[,right delimiter={]}] at (7.5,1.2)
      {
      B_{1,1} \& \cdots \& B_{1,j} \& \cdots \& B_{1,p} \\
      \vdots \&  \& \vdots \&  \& \vdots \\
      B_{k,1} \& \cdots \& B_{k,j} \& \cdots \& B_{k,p} \\
      \vdots \&  \& \vdots \& \& \vdots \\
      B_{n,1} \& \cdots \& B_{n,j} \& \cdots \& B_{n,p} \\
      };

     \matrix (C)[matrix of math nodes, label skeleton, left delimiter=[,right delimiter={]}] at (7.5,-2.8)
      {
      C_{1,1} \& \cdots \& C_{1,j} \& \cdots \& C_{1,p} \\
      \vdots \&  \& \vdots \&  \& \vdots \\
      C_{i,1} \& \cdots \& C_{i,j} \& \cdots \& C_{i,p} \\
      \vdots \&  \& \vdots \& \& \vdots \\
      C_{m,1} \& \cdots \& C_{m,j} \& \cdots \& C_{m,p} \\
      };


               \begin{scope}[on background layer]
               \node[opacity=0.5, rounded corners=2pt, inner sep=-1pt, fill=green, fit=(A-3-1)(A-3-5)] {};
               \node[opacity=0.5, rounded corners=2pt, inner sep=-1pt, fill=blue, fit=(B-1-3)(B-5-3)] {};
               \node[opacity=0.5, rounded corners=2pt, inner sep=-1pt, fill=red, fit=(C-3-3)] {};

               \end{scope}




   \end{tikzpicture}
   }}
 \end{column}
\end{columns}
\end{frame}


\begin{frame}
  \frametitle{Algorithm}

\begin{columns}
  \begin{column}{0.6\textwidth}
\begin{algorithm}[H]\caption{Square Matrix Multiplication}
  \setlength{\lineskip}{7pt}
  \begin{algorithmic}[1]
    \Function{MM}{$\textbf{A}, \textbf{B}, \textbf{C}$}
    \State $sum \gets 0$
    \State $n \gets columns(\textbf{A}) == rows(\textbf{B})$
    \State $m \gets rows(\textbf{A})$
    \State $p \gets columns(\textbf{B})$

      \For{$i = 0,1,2 \dots,m-1$}
      \For{$j = 0,1,2 \dots,p-1$}
      \State $sum \gets 0$
      \For{$k = 0,1,2 \dots,n-1$}
        \State $sum \gets  sum + \textbf{A}[i][k] \cdot \textbf{B}[k][j]$
      \EndFor
      \State $\textbf{C}[i][j] \gets  sum $
      \EndFor
      \EndFor
      \State \textbf{return} $\textbf{C}$
   \EndFunction
  \end{algorithmic}
\end{algorithm}
\end{column}
\begin{column}{0.4\textwidth}
\Huge$\mathcal{O}(n^3)$
\end{column}
\end{columns}

\end{frame}