Arrays & Hashing pattern
Intersection of Two Arrays
Given two integer arrays, return an array of their intersection. Each value in the result must appear only once, and the order does not matter. Watch it run step by step, then write your own pseudocode and get it checked by AI.
- LeetCode 349
- Easy
- 2 approaches
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Arrays & HashingLeetCode 349
Easy
From the first idea to the best one
- 01 Brute force · nested loops O(n · m)O(k) space
- 02 Optimized · hash set O(n + m)O(n) space
What you will learn
- How to read Intersection of Two Arrays and spot the arrays & hashing pattern in it
- Brute force · nested loops: O(n · m) time, O(k) space
- Optimized · hash set: O(n + m) time, O(n) 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 Intersection of Two Arrays run, step by step
Sign in and this page opens on the animation, with all 13 Arrays & Hashing problems beside it.
DSA comes with the all labs plan and every ChaiCode batch.