Arrays & Hashing pattern
Product of Array Except Self
Given an integer array, return an array where output[i] equals the product of every element except arr[i]. Solve it in O(n) time without using the division operation. Watch it run step by step, then write your own pseudocode and get it checked by AI.
- LeetCode 238
- Medium
- 2 approaches
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Arrays & HashingLeetCode 238
Medium
From the first idea to the best one
- 01 Brute force O(n²)O(1) space
- 02 Optimized · prefix × suffix O(n)O(1) space
What you will learn
- How to read Product of Array Except Self and spot the arrays & hashing pattern in it
- Brute force: O(n²) time, O(1) space
- Optimized · prefix × suffix: O(n) time, O(1) space
- The pseudocode for each approach, its line lit as the animation runs
- Practice: write your own pseudocode and get it checked
More Arrays & Hashing
See Product of Array Except Self run, step by step
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DSA comes with the all labs plan and every ChaiCode batch.