2441. Largest Positive Integer That Exis

[흑화뉴비(coderhs)]

class Solution:

    def findMaxK(self, nums: List[int]) -> int:

        s, a = set(nums), 0

        for num in nums:

            if num > a and -num in s: a = num

        return a if a > 0 else -1

뭘 해도 재밌게 풀 방법은 없군..