fix build

Author: fishercoder1534

src/main/java/com/fishercoder/solutions/_380.java

@@ -1,6 +1,10 @@
 package com.fishercoder.solutions;
 
-import java.util.*;
+import java.util.HashMap;
+import java.util.List;
+import java.util.ArrayList;
+import java.util.Map;
+import java.util.Random;
 
 /**
  * 380. Insert Delete GetRandom O(1)