Bit Manipulation pattern
Single Number
Given a non-empty array where every element appears twice except for one, find that single one using O(1) extra space. Watch it run step by step, then write your own pseudocode and get it checked by AI.
- LeetCode 136
- Easy
- 2 approaches
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Bit ManipulationLeetCode 136
Easy
From the first idea to the best one
- 01 Brute · hash count O(n)O(n) space
- 02 Optimized · XOR O(n)O(1) space
What you will learn
- How to read Single Number and spot the bit manipulation pattern in it
- Brute · hash count: O(n) time, O(n) space
- Optimized · XOR: 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 Bit Manipulation
See Single Number run, step by step
Sign in and this page opens on the animation, with all 5 Bit Manipulation problems beside it.
DSA comes with the all labs plan and every ChaiCode batch.