Create Contains Duplicate.py

Author: palashsharma891

Arrays/Easy/Contains Duplicate.py

@@ -0,0 +1,10 @@
+class Solution:
+    def containsDuplicate(self, nums: List[int]) -> bool:
+        #return not len(set(nums)) == len(nums)
+        dic = {}
+        for n in nums:
+            if n in dic:
+                return True
+            else:
+                dic[n] = 1
+        return False