1 files changed, 7 insertions, 0 deletions
diff --git a/set/tree.go b/set/tree.go
new file mode 100644
index 0000000..2f34cc8
--- /dev/null
+++ b/set/tree.go
@@ -0,0 +1,7 @@
+package tree
+
+type Tree interface {
+	Empty() bool
+	Insert(key int, val interface{})
+	Search(key int) interface{}
+}