Single Number | XOR Trick Explained | Python DSA
🚀 Welcome to CodeWithSubhash – Let’s master DSA together!
In today’s video, we solve a very popular interview problem:
👉 Single Number
Given an array where every element appears twice except one, we find that single element.
In this video, you’ll learn:
• Why XOR works
• Important XOR properties
• Step-by-step dry run
• Why this is O(n) and O(1) space
• Interview-level explanation
XOR Properties Used:
a ^ a = 0
a ^ 0 = a
XOR is commutative
⏱ Time Complexity: O(n)
📦 Space Complexity: O(1)
This is a must-know bit manipulation trick for coding interviews.
Consistency builds confidence.
Let’s grow together and become interview-ready 💪🔥
#DSA #Python #BitManipulation #XOR #CodingInterview #CodeWithSubhash
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