diff --git a/.hash b/.hash
index c140047..d29c58f 100644
--- a/.hash
+++ b/.hash
@@ -1,5 +1,5 @@
 ainotes.cls,2a364c6
-year1/cognition-and-neuroscience/module1,7f9131a
+year1/cognition-and-neuroscience/module1,57b03aa
 year1/cognition-and-neuroscience/module2,0b42962
 year1/combinatorial-decision-making-and-optimization/module1,ea45a50
 year1/combinatorial-decision-making-and-optimization/module2,593ea4c
@@ -8,7 +8,7 @@ year1/fundamentals-of-ai-and-kr/module1,ac34ec0
 year1/fundamentals-of-ai-and-kr/module2,14e408b
 year1/fundamentals-of-ai-and-kr/module3,e66b724
 year1/image-processing-and-computer-vision/module1,6609bde
-year1/image-processing-and-computer-vision/module2,ba88217
+year1/image-processing-and-computer-vision/module2,57b03aa
 year1/languages-and-algorithms-for-ai/module2,5a8c822
 year1/languages-and-algorithms-for-ai/module3,6809df7
 year1/machine-learning-and-data-mining,fa4f50d
diff --git a/year1/cognition-and-neuroscience/module1/cn1.pdf b/year1/cognition-and-neuroscience/module1/cn1.pdf
index b7534e6..5107e77 100644
Binary files a/year1/cognition-and-neuroscience/module1/cn1.pdf and b/year1/cognition-and-neuroscience/module1/cn1.pdf differ
diff --git a/year1/image-processing-and-computer-vision/module2/ipcv2.pdf b/year1/image-processing-and-computer-vision/module2/ipcv2.pdf
index af4ae68..b5031d7 100644
Binary files a/year1/image-processing-and-computer-vision/module2/ipcv2.pdf and b/year1/image-processing-and-computer-vision/module2/ipcv2.pdf differ