LaTex beamer：框外的算法行号

Question

我正在尝试将算法放入 beamer 文档中（使用algorithm2e包）。但行号打印在框外。其余文本也打印得稍微左移。在这个问题完全相同，只是我没有导入parskip包。

梅威瑟：

\documentclass[aspectratio = 169]{beamer}

\usepackage[linesnumbered, boxruled, boxed]{algorithm2e}
\usepackage{algpseudocode}

\SetKwInput{KwInput}{Input}

\begin{document}
    \begin{frame}{Algorithm}
        \begin{algorithm}[H]
            \caption{An algorithm.}
            \label{alg:example}
            \DontPrintSemicolon
            % 
            %%%%%%%%%%%%%%%%%%%%%
            %       I/O
            %%%%%%%%%%%%%%%%%%%%%
            
            \KwInput
            {
                Some input.
            }
            % 
            \BlankLine
            
            %%%%%%%%%%%%%%%%%%%%%
            %       BODY
            %%%%%%%%%%%%%%%%%%%%%
            
            First step. \;
            % 
            Second step. \;
            % 
            Third step. \;
        \end{algorithm}
    \end{frame}
\end{document}

输出：