contain duplicate solution

Author: hyeri0903

contains-duplicate/hyeri0903.py

@@ -0,0 +1,13 @@
+class Solution:
+    def containsDuplicate(self, nums: List[int]) -> bool:
+        ans = False
+        dic = dict()
+
+        for n in nums:
+            if n in dic:
+                return True
+            else:
+                dic[n] = 1
+        return ans
+
+