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Data Structures for Coding Interviews in JavaScript

Solution: Product of Array Except Self

Explore how to compute the product of all elements except the current one in an array efficiently in JavaScript. This lesson guides you through a brute force method and a more optimal bidirectional product accumulation technique with O(n) time and constant space complexity.

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Statement

You’re given an integer array, nums. Return a resultant array product so that product[i] is equal to the product of all the elements of nums except nums[i].

Write an algorithm that runs in O(n)O(n) time without using the division operation.

Constraints:

  • 2≤2 \leq nums.length ≤103\leq 10^3
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