diff --git a/.txt b/.txt
new file mode 100644
index 0000000..80858c1
--- /dev/null
+++ b/.txt
@@ -0,0 +1 @@
+branch
diff --git a/doc/5.5.txt b/doc/5.5.txt
new file mode 100644
index 0000000..99a9cca
--- /dev/null
+++ b/doc/5.5.txt
@@ -0,0 +1 @@
+5.5作业