diff --git a/day3/条件控制.py b/day3/条件控制.py
index 29eb089..997c6d5 100644
--- a/day3/条件控制.py
+++ b/day3/条件控制.py
@@ -4,4 +4,4 @@ for i in a:
         i = int(i)
         print(i * 2)
     else:
-        print(i)
+        print(i)
\ No newline at end of file
diff --git a/day4/列表.py b/day4/列表.py
new file mode 100644
index 0000000..e69de29