LeetCode 9: Palindrome Number Explained | C++ Optimal Solution

🚀 LeetCode 9: Palindrome Number Explained Step by Step in C++ In this video, we solve the popular LeetCode 9 — Palindrome Number problem using the optimal mathematical approach without converting the number into a string. You’ll learn: ✅ How palindrome numbers work ✅ Reverse Half Technique Explained ✅ Why negative numbers are not palindromes ✅ Complete line-by-line C++ code explanation ✅ Dry run examples ✅ Time and Space Complexity analysis Problem Statement: Given an integer x, return true if x is a palindrome, and false otherwise. A palindrome number reads the same forward and backward. Example: Input: 121 Output: true Input: -121 Output: false Key Idea: Reverse only HALF of the number Compare the first half with the reversed second half Avoid extra space and string conversion Why this approach is better: ✅ O(log n) Time Complexity ✅ O(1) Extra Space ✅ Interview-Optimized Solution Topics Covered: Math Numbers Reverse Integer Logic Palindrome Check LeetCode 9 C++ STL DSA Interview Preparation Coding Interview Questions This video is perfect for: Beginners learning DSA LeetCode preparation Coding interview preparation Competitive programming C++ programmers #leetcode #palindromenumber #leetcode9 #cplusplus #dsa #codinginterview #algorithms #programming #interviewprep #math