Product_of_Array_Except_Self.py

import math

class Solution:
    def productExceptSelf(self, nums: List[int]) -> List[int]:
        result = [0] * len(nums)
        product = 1
        for i in range(len(nums) -1, -1, -1):
            product *= nums[i]
            result[i] = product 
        product = 1
        for i in range(len(nums)):            
            next_one  = result[i+1] if i < len(result)-1 else 1
            result[i] =  product * next_one
            product *= nums[i]
        return result