🔥 LeetCode 67 | Add Binary (15-02-2026) | Easy Explanation

In this problem, you are given two binary strings a and b. Your task is to add these two binary numbers and return their sum as a binary string. Unlike normal addition, here you must follow binary rules — where digits can only be 0 or 1, and carry plays an important role. 🧠 Main Idea Just like decimal addition: Start from the rightmost digit Add corresponding bits from both strings Handle the carry if the sum exceeds 1 Continue until all digits are processed Finally, if there is a remaining carry, add it to the front. ⚙️ Approach Overview To solve this efficiently: Traverse both strings from end to start Use a carry variable Build the result string step by step This ensures an optimized solution with O(n) time complexity. 📌 Key Concepts Covered String Manipulation Binary Arithmetic Carry Handling Two Pointer Technique 💡 Why Solve This Problem? LeetCode 67 is a beginner-friendly problem that helps you understand bit-level operations and improves your logic for handling string-based arithmetic — a common interview pattern. 👍 Like 👍 | Share 🔁 | Subscribe 🔔 for more LeetCode explanations and coding tutorials. 💬 Comment if you want the Java or Python implementation. Happy Coding! 💻🔥