数组-（product of arr exclude itself）累乘除了当前数组本身的数组其它数字

'''
除了数字本身的其它数累乘，替换本身数字
'''


class Solution:

    def productExcludeItself(self, nums):

        nums_size = len(nums)
        result = [1] * nums_size
        # 累乘数字前面的数
        for i in range(1, nums_size, 1):
            result[i] = result[i - 1] * nums[i - 1]
        temp = 1
        # 累乘数字后面的数
        for i in range(nums_size - 1, -1, -1):
            result[i] *= temp
            temp *= nums[i]
        return result


s = Solution()
A = [2, 3, 4, 5, 6, 7]
print(s.productExcludeItself(A))

[2520, 1680, 1260, 1008, 840, 720]