from typing import List


class Solution:
    def hasDuplicate(self, nums: List[int]) -> bool:
        if len(nums) == 0:
            return False
        res = dict()
        for entry in nums:
            is_dublicate = res.get(entry)
            if is_dublicate:
                return True
            res[entry] = True
        return False


input_1 = [1, 2, 3, 3]
input_2 = [1, 2, 3, 4]
input_3 = []
input_4 = [0]
input_5 = [1, 2, 2, 2, 2, 3, 1, 1]

sol = Solution()
print(sol.hasDuplicate(input_1))
print(sol.hasDuplicate(input_2))
print(sol.hasDuplicate(input_3))
print(sol.hasDuplicate(input_4))
print(sol.hasDuplicate(input_5))