diff --git a/chapter01.tex b/chapter01.tex
index e95308c..07475b8 100644
--- a/chapter01.tex
+++ b/chapter01.tex
@@ -847,7 +847,7 @@ For example, the representation of
 $123$ in base $2$ is 1111011 and
 $\lfloor \log_2(123)+1 \rfloor = 7$.
 
-\section{Contests}
+\section{Contests and resources}
 
 \subsubsection{IOI}
 
@@ -931,9 +931,7 @@ Google Code Jam and Yandex.Algorithm.
 Of course, companies also use those contests for recruiting:
 performing well in a contest is a good way to prove one's skills.
 
-\section{Resources}
-
-\subsubsection{Competitive programming books}
+\subsubsection{Books}
 
 There are already some books (besides this book) that
 concentrate on competitive programming and algorithmic problem solving:
@@ -950,8 +948,6 @@ the University of Warsaw Programming Competitions} \cite{dik12}
 The first two books are intended for beginners,
 whereas the last book contains advanced material.
 
-\subsubsection{General algorithm books}
-
 Of course, general algorithm books are also suitable for
 competitive programmers.
 Some popular books are: