diff --git a/chapter01.tex b/chapter01.tex
index 52428b1..03de3fa 100644
--- a/chapter01.tex
+++ b/chapter01.tex
@@ -887,12 +887,13 @@ The International Collegiate Programming Contest (ICPC)
 is an annual programming contest for university students.
 Each team in the contest consists of three students,
 and unlike in the IOI, the students work together;
-there is even only one computer available for each team.
+there is only one computer available for each team.
 
 The ICPC consists of several stages, and finally the
 best teams are invited to the World Finals.
 While there are tens of thousands of participants
-in the contest, there are only 128 final slots available,
+in the contest, there are only a small number\footnote{The exact number of final
+slots varies from year to year; in 2016, there were 128 final slots.} of final slots available,
 so even advancing to the finals
 is a great achievement in some regions.