LeetCode 66 Plus One | Optimal O(n) Solution Explained | C++ | Step-by-Step Interview Approach

🚀 LeetCode 66 — Plus One | Complete Explanation In this video, I explain how to solve the Plus One problem using an optimal approach in C++. This is a beginner-friendly tutorial where I walk through the problem step-by-step, explain the logic clearly, and demonstrate how to handle carry just like real-life addition. 📌 What you’ll learn: • Problem understanding with examples • Step-by-step approach (carry handling) • Live coding explanation • Line-by-line code walkthrough • Time and Space Complexity 💡 Problem Statement: Given a non-empty array of digits representing a non-negative integer, increment the integer by one and return the resulting array. 🧠 Approach: We traverse the array from right to left. If a digit is less than 9, we increment it and return. If a digit is 9, we set it to 0 and carry forward. If all digits are 9, we insert 1 at the beginning. ⏱️ Timestamps: 00:00 Introduction 00:40 Problem Explanation 01:30 Approach 02:30 Live Coding 04:30 Code Explanation 06:00 Complexity Analysis 🎯 Why this problem is important: • Frequently asked in coding interviews • Helps understand carry handling • Builds strong problem-solving skills 🔔 Don’t forget to: Like 👍 Comment 💬 Subscribe 🔔 #LeetCode66 #PlusOne #DSA #CodingInterview #CPlusPlus #Programming #BeginnerCoding #PlacementPreparation