--- a/cws/cw04.tex	Mon Nov 04 11:48:37 2019 +0000
+++ b/cws/cw04.tex	Mon Nov 04 13:28:05 2019 +0000
@@ -104,7 +104,7 @@
 
 \noindent
 This part is about the shunting yard algorithm by Dijkstra and a
-regular expression matcher by Brzozowski. The preliminary part is due on
+regular expression matcher by Brzozowski. The preliminary part (4\%) is due on
 \cwNINE{} at 4pm; the core, more advanced part, is due on \cwNINEa{}
 at 4pm. The preliminary part is about the Shunting Yard Algorithm that
 transforms the usual infix notation of arithmetic expressions into the