\documentclass{../Lecture}
\usepackage{../preamble}

\title{Криптографические методы защиты информации}
\author{Андрей Гущин}
\date{\today}

\includeonly{
    % lectures/lecture1,
    % lectures/lecture2,
    lectures/lecture3,
    lectures/lecture4,
    lectures/lecture5,
    lectures/lecture6,
    lectures/lecture7,
    lectures/lecture8,
}

\begin{document}

\maketitle
\tableofcontents

\section{\ldots{}}

\subsection{\ldots{}}

% \include{lectures/lecture1.tex}
% \include{lectures/lecture2.tex}
\include{lectures/lecture3.tex}
\include{lectures/lecture4.tex}
\include{lectures/lecture5.tex}
\include{lectures/lecture6.tex}
\include{lectures/lecture7.tex}
\include{lectures/lecture8.tex}

\end{document}