LeetCode:面试题 16.06.最小差

思路：对两个list 排序，从小到大依次对比两个数组元素的差

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