diff --git a/.gitignore b/.gitignore
index 5d381cc..396e038 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,7 +6,7 @@ __pycache__/
 
 # C extensions
 *.so
-
+.DS_Store
 # Distribution / packaging
 .Python
 build/
diff --git a/shahovaa/429.md b/shahovaa/429.md
new file mode 100644
index 0000000..e69de29