diff --git a/.hash b/.hash
index e48d758..7d4bd16 100644
--- a/.hash
+++ b/.hash
@@ -1,7 +1,7 @@
 ainotes.cls,d9b2afb
 cognition-and-neuroscience,f619bee
 combinatorial-decision-making-and-optimization/module1,1ebcad4
-combinatorial-decision-making-and-optimization/module2,1cd91f0
+combinatorial-decision-making-and-optimization/module2,1290f34
 deep-learning,2582b90
 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 c1c96df..5aec315 100644
Binary files a/combinatorial-decision-making-and-optimization/module2/cdmo2.pdf and b/combinatorial-decision-making-and-optimization/module2/cdmo2.pdf differ