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\begin{document}

\begin{algorithm}[H]\caption{Square Matrix Multiplication}
  \setlength{\lineskip}{7pt}
  \begin{algorithmic}[1]
    \Function{MM}{$\textbf{A}, \textbf{B}, \textbf{C}, n$}
    \State $sum \gets 0$
      \For{$i = 0,1,2 \dots,n-1$}
      \For{$j = 0,1,2 \dots,n-1$}
      \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
    \EndFunction
  \end{algorithmic}
\end{algorithm}
\end{document}