如何在幻灯片上放入大型伪代码？

Question

我在幻灯片中使用了以下 beamer 类。我在幻灯片中放了一些算法，但伪代码看起来不太好

    \frame[shrink=25]{\frametitle{Algorithms in Quotient Groups}

      \begin{algorithm}[H]
      \SetAlgoLined
      \textbf{Input} : A group $G$ and a normal subgroup $N$ of $G$\;
      \textbf{Find} : Lists $L_i$'s and the elements $m_i$'s as described 
       above\;
    \vspace{0.3cm}
    Create an array $\it{flag}$ indexed by the elements of $G$ and set $flag[g]  =0, \forall g \in G$\;
      $i \leftarrow 0$\;
    \For{$g   \in G$ }{
    \If{$\it{flag}[g] = 0$ }{

     % Compute $N_1g$\;
     $i \leftarrow i +1$\;
     Prepare a list $L_i$ of size $|G/N|$ with the elements of $Ng$\;
     $m_i \leftarrow \textit { min }L_i$\;  %$\texttt{ linear search on } L_i$\;
     \For{$g_1   \in Ng$ }{
      $\it{flag}[g_1] = 1$\;

    }
    }
}
\caption{Computing lists corresponding to the cosets of $N$ in $G$.}
\label{algo1}
\end{algorithm}



}

问题 ： 这里有几个问题，第一个幻灯片标题和算法之间的间距。第二个伪代码左侧移位。还有其他更好的方法来放置算法的伪代码吗？