diff --git a/go.mod b/go.mod
index e062fa1..62a16fd 100644
--- a/go.mod
+++ b/go.mod
@@ -1,3 +1,5 @@
 module leetcode-go
 
 go 1.25.5
+
+require github.com/emirpasic/gods/v2 v2.0.0-alpha
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..b591532
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,2 @@
+github.com/emirpasic/gods/v2 v2.0.0-alpha h1:dwFlh8pBg1VMOXWGipNMRt8v96dKAIvBehtCt6OtunU=
+github.com/emirpasic/gods/v2 v2.0.0-alpha/go.mod h1:W0y4M2dtBB9U5z3YlghmpuUhiaZT2h6yoeE+C1sCp6A=
diff --git a/tools.go b/tools.go
new file mode 100644
index 0000000..cd2b347
--- /dev/null
+++ b/tools.go
@@ -0,0 +1,5 @@
+package leetcodego
+
+import (
+	_ "github.com/emirpasic/gods/v2/utils"
+)