diff --git a/src/solution/test.java b/src/solution/test.java
index a08ac95..a8b3ff0 100644
--- a/src/solution/test.java
+++ b/src/solution/test.java
@@ -1,9 +1,7 @@
 package solution;
 
 
-import java.util.Arrays;
-import java.util.HashSet;
-import java.util.Set;
+import java.util.*;
 import java.util.stream.Collectors;
 
 public class test {
@@ -21,8 +19,12 @@ public class test {
 //        String[] strs = new String[]{"flower","flower","flower","flower"};
 //        String result =  Solution.longestCommonPrefix(strs);
 //        System.out.println(result);
-        int m = Solution.majorityElement(nums1);
-        System.out.println(m);
+//        int m = Solution.majorityElement(nums1);
+//        System.out.println(m);
+        HashMap<Integer,Integer> map = new HashMap<>();
+        HashSet<Integer> set1 = new HashSet<>();
+        new LinkedHashSet<>();
+        new TreeSet<>();
     }
 
 }