面试题 16.06. 最小差

class Solution:
    def smallestDifference(self, a: List[int], b: List[int]) -> int:
        a.sort()
        b.sort()
        result = 2147483647
        i = 0
        j = 0
        while (i < len(a) and j < len(b)):
            result = min(result,abs(a[i] - b[j]))
            if a[i] > b[j]:
                j = j + 1
            else:
                i = i + 1
        return result