LeetCode 190 | Reverse Bits | Bit Manipulation Explained Step-by-Step | C++

LeetCode 190 — Reverse Bits. Given a 32-bit unsigned integer,
reverse all of its bits and return the result. This is a pure bit
manipulation problem that teaches you exactly how bits are extracted,
shifted, and reassembled — the way CPUs think.

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🔗 IMPORTANT LINKS

💻 GitHub (Solutions Repo) → https://github.com/hanumanraj07/LeetCode
🌐 Portfolio → https://hanumanrajpurohit.vercel.app
💼 LinkedIn → https://linkedin.com/in/hanumanraj07
🧩 Problem Link → https://leetcode.com/problems/reverse-bits/

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📌 WHAT IS THIS PROBLEM?

Given a 32-bit unsigned integer n, reverse its bits and return
the resulting integer.

Input → 00000010100101000001111010011100
Output → 00111001011110000010100101000000

Every bit at position i goes to position 31-i.

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🛠️ APPROACH COVERED

Method → Bit Extraction + Left Shift Placement
Language → C++
Time → O(1) — always 32 iterations
Space → O(1)

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🎯 WHAT YOU WILL LEARN

→ How to extract the LSB using AND with 1
→ How to place a bit at the correct position using left shift
→ Why the loop always runs exactly 32 times
→ Handling uint32_t correctly in C++
→ Step-by-step dry run on a real binary input
→ Connection to LeetCode 191 (Number of 1 Bits)

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📬 CONNECT WITH ME

💼 LinkedIn → https://linkedin.com/in/hanumanraj07
🌐 Portfolio → https://hanumanrajpurohit.vercel.app
💻 GitHub → https://github.com/hanumanraj07

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Видео LeetCode 190 | Reverse Bits | Bit Manipulation Explained Step-by-Step | C++ канала Hanuman Singh Rajpurohit