DSA in Python – Single Number | Bit Manipulation & XOR Trick | Leetcode 136 – Part 67 [Hindi]

🚀 Welcome to Part 67 of Code & Debug’s DSA in Python Course!

In this lecture, we solve Leetcode Problem 136: Single Number, a classic problem that uses Bit Manipulation (XOR trick) to find the unique element in an array where every other number appears twice.

📚 What you’ll learn in this video:
✅ Understanding the problem statement & constraints
✅ Brute force vs. optimized bitwise XOR approach
✅ How XOR cancels out duplicate elements efficiently
✅ Step-by-step Python implementation
✅ Time and space complexity analysis

💡 Why is this important?
The XOR operation is a powerful technique in bitwise programming that helps in finding unique elements, swapping numbers, and detecting differences. This problem is a common interview question and a must-know trick for coding competitions.

👉 Link to solve this question:
https://leetcode.com/problems/single-number/description/

👉 Refer the article below for better understanding:

Single Number | Leetcode 136 | Brute Force and Optimal solution in Python

👉 📄 Access the full YouTube DSA Playlist Sheet (All Questions in Order):
🔗 https://docs.google.com/spreadsheets/d/1AWE15Fy3wD2iqu2vjK_R7cCiuvSsjYQclcdZmHpF66o/edit?usp=sharing

👉 Enroll in the free DSA Python course here:
https://codeanddebug.in/course/master-dsa-with-leetcode

👉 Enroll for Self-Paced Advance DSA course here:
https://codeanddebug.in/course/zero-to-hero-python-dsa

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