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Learn Data Structures and Algorithms in JavaScript

Problem: Product of Array Except Self

Understand how to solve the product of array except self problem by computing prefix and suffix products without using division. Learn to implement an efficient O(n) time and O(1) extra space algorithm with array traversal techniques.

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Statement

Given an integer array nums, return an array answer where answer[i] represents the product of all elements in nums except nums[i].

You must design an algorithm that operates in O(n)O(n) time complexity and does not use the division operation.

Note: The product of any prefix or suffix of nums is guaranteed to fit in a 3232-bit integer.

Constraints:

  • 2≤2 \leq nums.length ≤105\leq 10^5 ...