📌 Day 61: LeetCode Daily Challenge: LeetCode 67 – Add Binary

🔎 Problem Summary:

You are given two binary strings a and b.
Return their sum as a binary string.

This is basically performing binary addition manually, just like we do on paper — but from right to left.

💡 Approach:

🔹 Start from the last index of both strings.
🔹 Maintain a carry variable.
🔹 Add corresponding bits + carry.
🔹 Append (sum % 2) to result.
🔹 Update carry as sum / 2.
🔹 Reverse the final string (since we build from right → left).

⚡ Why This Works:

Binary addition rules:

0 + 0 = 0

1 + 0 = 1

1 + 1 = 10 (write 0, carry 1)

1 + 1 + 1 = 11 (write 1, carry 1)

We simulate exactly this.

⏱️ Complexity:

Time Complexity: O(max(n, m))
Space Complexity: O(max(n, m))

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📚 DSA Playlists (Structured Order)
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▶️ Queue:
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▶️ Linked List:
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▶️ Binary Search:
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▶️ Recursion:
https://www.youtube.com/playlist?list=PL4of1palJ6mzU09AQ4gsLaxRUk7y_TnN2
▶️ Hashing:
https://www.youtube.com/playlist?list=PL4of1palJ6mz2wl5zyM0ejC7TJ5XZ1jc-
▶️ Bit Manipulation:
https://www.youtube.com/playlist?list=PL4of1palJ6mxTFdHNr4C6dDPoAzoTgLj
▶️ Two Pointer Technique:
https://www.youtube.com/playlist?list=PL4of1palJ6myu4hsLtA2OaklXewaFmCG5
▶️ Arrays:
https://www.youtube.com/playlist?list=PL4of1palJ6mxnRW2shnnTUrAXGiijYY2h
▶️ Sorting:
https://www.youtube.com/playlist?list=PL4of1palJ6mxS2uhlO0I9NvjWQ26KkgqB

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👨‍💻 Coding Profiles
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#leetcode #dsa #BinaryAddition #BitManipulation #LeetCodeDailyChallenge

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