config.tex

\documentclass[12pt,a4paper]{article}

\usepackage[english,italian]{babel}
\usepackage[utf8]{inputenc}
\usepackage{hyperref} 
\hypersetup{
    bookmarks=true,         % show bookmarks bar?
    % unicode=false,          % non-Latin characters in Acrobat’s bookmarks
    % pdftoolbar=true,        % show Acrobat’s toolbar?
    pdfmenubar=true,        % show Acrobat’s menu?
    % pdffitwindow=false,     % window fit to page when opened
    pdfstartview={FitH},    % fits the width of the page to the window
    pdftitle={Appunti di Algoritmi e Strutture Dati},    % title
    pdfauthor={Timoty Granziero, Marco Siragna},     % author
    % pdfsubject={},   % subject of the document 
    % pdfcreator={Creator},   % creator of the document
    % pdfproducer={Producer}, % producer of the document
    % pdfkeywords={keyword1, key2, key3}, % list of keywords
    % pdfnewwindow=true,      % links in new PDF window
    colorlinks=true,       % false: boxed links; true: colored links
    linkcolor=black,          % color of internal links (change box color with linkbordercolor)
    % citecolor=green,        % color of links to bibliography
    % filecolor=magenta,      % color of file links
    urlcolor=red!50!black           % color of external links
}

\usepackage{graphicx} % img/media

% lists
\usepackage{enumitem}
\renewcommand{\labelitemi}{$\circ$}
\renewcommand{\labelitemii}{$\cdot$}
\renewcommand{\labelitemiii}{$\diamond$}
\renewcommand{\labelitemiv}{$\ast$}

\usepackage[perpage]{footmisc} % footnote, starting at 1 every page

\usepackage{mathtools,stmaryrd} % math package
\usepackage{amssymb} % N, R ... symbols
\usepackage{blkarray} % block arrays
\usepackage{cancel} % diagonal lines to cancel terms in math

\usepackage{textcomp} % quotes

\usepackage{totpages}

\let\emph\relax % there's no \RedeclareTextFontCommand
\DeclareTextFontCommand{\emph}{\bfseries} %emph to textbf

% floor and ceil
\DeclarePairedDelimiter\ceil{\lceil}{\rceil}
\DeclarePairedDelimiter\floor{\lfloor}{\rfloor}

% abs and norm
\DeclarePairedDelimiter\abs{\lvert}{\rvert}
\DeclarePairedDelimiter\norm{\lVert}{\rVert}

% Swap the definition of \abs* and \norm*, so that \abs
% and \norm resizes the size of the brackets, and the 
% starred version does not.
\makeatletter
\let\oldabs\abs
\def\abs{\@ifstar{\oldabs}{\oldabs*}}
\let\oldnorm\norm
\def\norm{\@ifstar{\oldnorm}{\oldnorm*}}
\makeatother

% add spacing after exists and forall
\let\existstemp\exists
\let\nexiststemp\nexists
\let\foralltemp\forall
\renewcommand{\exists}{\existstemp~}
\renewcommand{\nexists}{\nexiststemp~}
\renewcommand{\forall}{\foralltemp~}

\newcommand{\angleset}[1]{\langle #1 \rangle} % faster string representation as a set of characters


% algorithms pseudocode
\usepackage{clrscode3e}
\renewcommand{\ElseIf}{\kill\addtocounter{indent}{-1}\liprint\textbf{else if} }
\renewcommand{\Downto}{\ifmmode\ \textrm{\textbf{down to}}\ \else\textbf{down to}\ \fi}
\renewcommand{\And}{\ifmmode\ \textrm{\textbf{and}}\ \else\textbf{and}\ \fi}
\newcommand{\Or}{\ifmmode\ \textrm{\textbf{or}}\ \else\textbf{or}\ \fi}

\RequirePackage{graphics} % needed for \scalebox command

% drawing and trees
\usepackage{tikz}
\usepackage{tikz-qtree}
\usetikzlibrary{calc,positioning,arrows.meta}
\tikzset{
	rec/.style={
		every node/.style={align=center},
		edge from parent/.style={draw},
		no edge from this parent/.style={every child/.append style={edge from parent/.style={draw=none}}},
		level 3/.style={level distance=20mm},
		level 4/.style={level distance=5mm},
		level/.style={level distance=25mm, sibling distance=40mm/##1}
	},
	tree/.style={
		every tree node/.style={minimum size=10mm,black},
		edge from parent/.style={draw,edge from parent path={(\tikzparentnode) -- (\tikzchildnode)}},
		sibling distance=8mm,
		level distance=18mm
	},
	red/.style={draw=none},
	black/.style={draw,circle},
	unknown/.style={dashed},
	unknown2/.style={dotted},
	blank/.style={draw=none},
	% double circle macro
	old inner xsep/.estore in=\oldinnerxsep,
	old inner ysep/.estore in=\oldinnerysep,
	double circle/.style 2 args={
		circle,
		old inner xsep=\pgfkeysvalueof{/pgf/inner xsep},
		old inner ysep=\pgfkeysvalueof{/pgf/inner ysep},
		/pgf/inner xsep=\oldinnerxsep+#1,
		/pgf/inner ysep=\oldinnerysep+#1,
		alias=sourcenode,
		append after command={
			let \p1=(sourcenode.center),
			\p2=(sourcenode.east),
			\n1={\x2-\x1-#1-0.5*\pgflinewidth}
			in node[inner sep=0pt,draw,circle,minimum width=2*\n1,at=(\p1),#2]{}
		}
	},
	double circle/.default={4pt}{black}
}

\usepackage{fancyhdr} % header and footer

% header/footer setup
\fancyhf{}
\fancyhead[R]{\small\scshape\nouppercase{\leftmark}}
\fancyhead[L]{\small\scshape\nouppercase{\rightmark}}
\lhead{\nouppercase{\rightmark}}
\rhead{\nouppercase{\leftmark}}
\cfoot{\thepage}

\pagestyle{fancy}