contains duplicate sol

Author: MJ Kang

contains-duplicate/mandoolala.py

@@ -0,0 +1,23 @@
+"""
+https://leetcode.com/problems/contains-duplicate/
+"""
+from typing import List
+
+class Solution:
+    def containsDuplicate(self, nums: List[int]) -> bool:
+        '''
+        [Complexity]
+        Time: O(n)
+        Space: O(n)
+        '''
+        return (len(nums) != len(set(nums)))
+
+        '''
+        alternative:
+        nums_set = set()
+        for num in nums:
+            if num in nums_set:
+                return True
+            nums_set.add(num)
+        return False
+        '''