diff --git a/Interview Questions solutions/contain duplicate/index.py b/Interview Questions solutions/contain duplicate/index.py
index 7660e5a..86e9be4 100644
--- a/Interview Questions solutions/contain duplicate/index.py	
+++ b/Interview Questions solutions/contain duplicate/index.py	
@@ -1,11 +1,3 @@
-from collections import defaultdict
-
 class Solution:
     def containsDuplicate(self, nums: List[int]) -> bool:
-        m = defaultdict(int)
-
-        for num in nums:
-            if m[num]:
-                return True
-            m[num]+=1
-        return False
\ No newline at end of file
+        return len(set(nums)) != len(nums)