[E].[Py].3131.FindTheIntegerAddedToArrayI

class Solution(object):
    def addedInteger(self, nums1, nums2):
        """
        :type nums1: List[int]
        :type nums2: List[int]
        :rtype: int
        """
        """nums1.sort()
        nums2.sort()
        return nums2[0] - nums1[0]"""
        s1 = 0
        s2 = 0
        for i in range(0, len(nums1)):
            s1 += nums1[i]
            s2 += nums2[i]
        return (s2 - s1)/len(nums1)