from re import S # # 代码中的类名、方法名、参数名已经指定，请勿修改，直接返回方法规定的值即可 # # # @param numbers int整型一维数组 # @return int整型 # class Solution: def duplicate(self , numbers: List[int]) -> int: s = len(numbers) if s <= 1 : return -1 nums = set() for num in numbers: if num in nums: return num nums.add(num) return -1...
