diff --git a/q3/q3_1/.gitkeep b/q3/q3_1/.gitkeep
new file mode 100644
index 0000000..d02ba80
--- /dev/null
+++ b/q3/q3_1/.gitkeep
@@ -0,0 +1 @@
+# 目录占位
\ No newline at end of file