Find the Number That Appears Once | Striver A2Z DSA – Arrays Problem 12 | Java & C++

In this video, I solve Arrays Problem 12: Find the Number That Appears Once, While Others Appear Twice from Striver’s A2Z DSA Sheet using the optimal XOR approach.

Complete Striver’s A2Z DSA Sheet Playlist: https://www.youtube.com/playlist?list=PLp0gt9MdYKIAgWxiOKGfBSa0Fc5ejcV7T

You’ll learn:
✅ Why XOR is the best solution for this problem
✅ How duplicate numbers cancel out
✅ Step-by-step explanation with examples
✅ Brute force vs optimal approach
✅ Implementation in Java and C++
✅ Time & Space Complexity explained

This is a very common interview problem asked in MAANG, product-based companies, and coding rounds, especially to test bit manipulation and array logic.

📌 Part of my Striver A2Z DSA Sheet – Arrays Series

🔍 Keywords (Natural & Effective)

find number appears once, striver a2z arrays, xor array problem, single number array, appears once others twice, single number java, single number c++

🏷️ Hashtags

#StriverA2Z #DSA #Arrays #SingleNumber #XOR #BitManipulation #Java #Cpp #CodingInterview #Placements #DSAForBeginners

Видео Find the Number That Appears Once | Striver A2Z DSA – Arrays Problem 12 | Java & C++ канала devnomy