Missing and Repeating Number | O(1) Space Optimal Approach | GFG POTD | C++ Explained
Автор: EdgeCases101
Загружено: 2025-12-11
Просмотров: 1
🔥 In this video, we solve the popular Missing and Repeating Number problem from GFG POTD (10 Dec) using an optimal O(1) extra space approach.
This is a very common array + math based interview question and helps you master in-place techniques without using extra memory.
💡 What you'll learn:
✔️ Clear understanding of the problem
✔️ Why brute force & hashing are not optimal
✔️ Step-by-step in-place logic
✔️ Complete C++ implementation
✔️ Dry run with example
✔️ Time & Space Complexity:
👉 O(n) Time
👉 O(1) Space
A must-watch problem for coding interviews and DSA practice!
📌 Don’t forget:
👍 Like the video
🔔 Subscribe for daily GFG + LeetCode solutions
💬 Comment your doubts — we reply to all!
#DSA #ArrayProblems #GFGPOTD #MissingNumber #RepeatingNumber #CPlusPlus #InterviewPrep
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