diff --git a/#442/Solution.java b/#442/Solution.java
new file mode 100644
index 0000000..ffc77a2
--- /dev/null
+++ b/#442/Solution.java
@@ -0,0 +1,24 @@
+import java.util.*;
+
+class Solution {
+    public List<Integer> findDuplicates(int[] nums) {
+        int n = nums.length;
+        int x = -1;
+        ArrayList<Integer> list = new ArrayList<>();
+        for(int i=0; i<nums.length; i++){
+    
+            if(nums[i] >=0 )
+                x = nums[i];
+            else
+                x = nums[i] + n +1 ;
+            
+            if(nums[x - 1] >= 0 )
+                nums[x - 1] = nums[x - 1] - (n +1);
+            else
+                list.add(x);
+            
+        }
+        
+        return list;
+    }
+}
\ No newline at end of file