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Algorithms Programming Languages Database System Design

Blind 75 Difficulty: Easy Difficulty: Medium Difficulty: Hard

Android Data Science Computer Vision Simulations

UUID Generator Code Formatter

Single Number 2 - All elements except one occur thrice

medium Solve on LeetCode

Problem
Examples
Solution
Method 1 - Naive Approach
Method 2 - Using Hashset
Method 3 - Sorting and Keeping Count
Method 4 - Using Xor 🏆
Code
Complexity
Method 5 - Using Bit Vector and Divisibility by 3 🏆
Code
Complexity
Dry Run

Related Tags

array-algo bit-manipulation bits daily-coding-problem duplicates-algo leetcode non-duplicated-algo repeat xor

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