Number 217

https://leetcode.com/problems/contains-duplicate/

from typing import List

class Solution:
    def containsDuplicate(self, nums: List[int]) -> bool:
        nums2 = (set(nums))
        if len(nums2) != len(nums):
            return True
        return False

a = Solution()

print(a.containsDuplicate([1,2,3,1]))
print(a.containsDuplicate([1,2,3,4]))
print(a.containsDuplicate([1,1,1,3,3,4,3,2,4,2]))

True
False
True