diff --git a/.hash b/.hash
index aa1d7da..5cf745e 100644
--- a/.hash
+++ b/.hash
@@ -2,6 +2,6 @@ ainotes.cls,dc59cd4
 fundamentals-of-ai-and-kr/module1,a90b33a
 fundamentals-of-ai-and-kr/module2,3763967
 fundamentals-of-ai-and-kr/module3,58eee04
-languages-and-algorithms-for-ai/module2,71cd9e1
+languages-and-algorithms-for-ai/module2,7f3bc2d
 machine-learning-and-data-mining,098bb90
 statistical-and-mathematical-methods-for-ai,b8b751d
diff --git a/languages-and-algorithms-for-ai/module2/main.pdf b/languages-and-algorithms-for-ai/module2/main.pdf
index a64dd6c..7f9bc4e 100644
Binary files a/languages-and-algorithms-for-ai/module2/main.pdf and b/languages-and-algorithms-for-ai/module2/main.pdf differ