diff --git a/.hash b/.hash
index 0ccc502..0c77499 100644
--- a/.hash
+++ b/.hash
@@ -2,7 +2,7 @@ ainotes.cls,2a364c6
 year1/cognition-and-neuroscience/module1,7f9131a
 year1/cognition-and-neuroscience/module2,f28880f
 year1/combinatorial-decision-making-and-optimization/module1,ea45a50
-year1/combinatorial-decision-making-and-optimization/module2,099283c
+year1/combinatorial-decision-making-and-optimization/module2,84c86cb
 year1/deep-learning,d7bb2ed
 year1/fundamentals-of-ai-and-kr/module1,ac34ec0
 year1/fundamentals-of-ai-and-kr/module2,14e408b
diff --git a/year1/combinatorial-decision-making-and-optimization/module2/cdmo2.pdf b/year1/combinatorial-decision-making-and-optimization/module2/cdmo2.pdf
index 0bef77b..979557a 100644
Binary files a/year1/combinatorial-decision-making-and-optimization/module2/cdmo2.pdf and b/year1/combinatorial-decision-making-and-optimization/module2/cdmo2.pdf differ