contains duplicate

Author: deepInTheWoodz

contains-duplicate/deepInTheWoodz.py

@@ -0,0 +1,9 @@
+class Solution:
+  def containsDuplicate(self, nums: List[int]) -> bool:
+    s = set()
+    for num in nums:
+      if num in s:
+        return True
+      else:
+        s.add(num)
+    return False