diff --git a/.hash b/.hash
index a5ad6ea..f54d8c2 100644
--- a/.hash
+++ b/.hash
@@ -1,5 +1,6 @@
 ainotes.cls,4b2f613
 cognition-and-neuroscience,409ab70
+combinatorial-decision-making-and-optimization,80deb12
 fundamentals-of-ai-and-kr/module1,1677e27
 fundamentals-of-ai-and-kr/module2,9622aab
 fundamentals-of-ai-and-kr/module3,f38189a
diff --git a/combinatorial-decision-making-and-optimization/cdmo.pdf b/combinatorial-decision-making-and-optimization/cdmo.pdf
new file mode 100644
index 0000000..9cb65b9
Binary files /dev/null and b/combinatorial-decision-making-and-optimization/cdmo.pdf differ