diff --git a/src/Pair.java b/src/Pair.java
index 4916a86..4c24770 100644
--- a/src/Pair.java
+++ b/src/Pair.java
@@ -1,3 +1,5 @@
+import java.util.*;
+
 public class Pair<T> {
     private T first;
     private T second;