2016. 增量元素之间的最大差值

from typing import List


class Solution:
    def maximumDifference(self, nums: List[int]) -> int:
        minn, diff = float('inf'), -1
        for num in nums:
            diff = max(num - minn, diff)
            minn = min(num, minn)
        return diff if diff > 0 else -1