724. 寻找数组的中心索引

 

 

 

class Solution(object):
    def pivotIndex(self, nums):
        """
        :type nums: List[int]
        :rtype: int
        """
        sumi = 0
        s = sum(nums)
        for i in range(len(nums)):
            if 2 * sumi + nums[i] == s:
                return i
            sumi += nums[i]
        return -1


if __name__ == '__main__':
    solution = Solution()
    print(solution.pivotIndex([-1, -1, 0, 1, 1, 0]))