\documentclass[twoside,12pt,a4paper,english]{book}

%\includeonly{luku02}

\usepackage[english]{babel}
\usepackage[utf8]{inputenc}
\usepackage{listings}
\usepackage[table]{xcolor}
\usepackage{tikz}
\usepackage{multicol}
\usepackage{hyperref}
\usepackage{array}
\usepackage{microtype}

\usepackage{fouriernc}
\usepackage[T1]{fontenc}

\usepackage{graphicx}
\usepackage{framed}
\usepackage{amssymb}
\usepackage{amsmath}

\usepackage{pifont}
\usepackage{ifthen}
\usepackage{makeidx}
\usepackage{enumitem}

\usepackage{titlesec}

\usetikzlibrary{patterns,snakes}
\pagestyle{plain}

\lstset{language=C++,frame=single,basicstyle=\ttfamily \small,showstringspaces=false,columns=flexible}
\lstset{
  literate={ö}{{\"o}}1
           {ä}{{\"a}}1
           {ü}{{\"u}}1
}
\lstset{xleftmargin=20pt,xrightmargin=5pt}
\lstset{aboveskip=12pt,belowskip=8pt}


\date{\Large \today}

\usepackage[a4paper,vmargin=30mm,hmargin=33mm,footskip=15mm]{geometry}

\title{\Huge Competitive Programmer's Handbook}
\author{\Large Antti Laaksonen}

\makeindex

\titleformat{\subsubsection}
{\normalfont\large\bfseries\sffamily}{\thesubsection}{1em}{}

\begin{document}

%\selectlanguage{finnish}

%\setcounter{page}{1}
%\pagenumbering{roman}

\frontmatter
\maketitle
\setcounter{tocdepth}{1}
\tableofcontents

\include{johdanto}

\mainmatter
\pagenumbering{arabic}
\setcounter{page}{1}

\newcommand{\key}[1] {\textbf{#1}}

\part{Basic techniques}
\include{luku01}
\include{luku02}
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\part{Graph algorithms}
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\part{Advanced topics}
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% \include{kirj}

\cleardoublepage
\printindex

\end{document}