diff --git a/.gitignore b/.gitignore
index b6cf81c..e02ca5a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,4 +3,5 @@
 !.gitignore
 !.vscode/
 !.vscode/*
-!19_1ac25efe11-city.png
\ No newline at end of file
+!19_1ac25efe11-city.png
+!README.md
\ No newline at end of file
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..71603c9
--- /dev/null
+++ b/README.md
@@ -0,0 +1,3 @@
+# acwing
+
+[题单](https://www.acwing.com/activity/content/introduction/6/)
\ No newline at end of file