diff --git a/.hash b/.hash
index 8dda315..d61e059 100644
--- a/.hash
+++ b/.hash
@@ -1,7 +1,7 @@
 ainotes.cls,d9b2afb
 cognition-and-neuroscience,13a55fa
 combinatorial-decision-making-and-optimization/module1,1ebcad4
-combinatorial-decision-making-and-optimization/module2,562b897
+combinatorial-decision-making-and-optimization/module2,2ffce7d
 deep-learning,fde1a0d
 fundamentals-of-ai-and-kr/module1,400dfd1
 fundamentals-of-ai-and-kr/module2,400dfd1
diff --git a/combinatorial-decision-making-and-optimization/module2/cdmo2.pdf b/combinatorial-decision-making-and-optimization/module2/cdmo2.pdf
index 53452b3..291e3ee 100644
Binary files a/combinatorial-decision-making-and-optimization/module2/cdmo2.pdf and b/combinatorial-decision-making-and-optimization/module2/cdmo2.pdf differ