Given an integer array nums, return an array answer such that answer[i] is equal to the product of all the elements of nums except nums[i].
You must write an algorithm that runs in O(n) time and without using the division operation.
Example 1:
Input: nums = [1,2,3,4]
Output: [24,12,8,6]
Example 2:
Input: nums = [-1,1,0,-3,3]
Output: [0,0,9,0,0]
2 <= nums.length <= 10^5-30 <= nums[i] <= 30[1,2,3,4]
[24,12,8,6]