Pen And Paper
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Welcome to your one-stop destination for complete tech interview preparation!
This channel is dedicated to helping you crack top tech interviews with high-quality content on:
✅ DSA – All core topics covered with intuitive explanations
✅ LLD (Low-Level Design) – Real-world design patterns and system modeling
✅ HLD (High-Level Design) – Scalable system architecture for interviews
✅ Machine Coding Rounds – End-to-end coding round solutions and walkthroughs
✅ Leetcode Problem Solving – From easy to hard, explained with clarity
✅ Other Platform Questions – Codeforces, GFG, HackerRank, and more
Whether you’re a beginner or brushing up before a FAANG interview, this channel equips you with everything you need to succeed – from problem-solving strategies to system design skills.
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Bit Manipulation Masterclass in ONE Video | Crack Any MAANG Bit Question FAST
Leetcode 78 | Subsets | Bit Manipulation | Recursion | MAANG Interview Preparation | Pen And Paper
LeetCode 1915 | Number of Wonderful Substrings| MAANG Interview | Optimal Solution | BIT Mask |
LeetCode 154 | Longest Awesome Substring | Best Bitmask Trick Explained Simply | MAANG Preparation
LeetCode 137 | Longest Substring with Vowels in Even Count | Bitmask + Basic | MANG Interview Prep
Leetcode 1318 | Minimum Flips | MAANG Preparation | Beats 100% | By Pen And Paper
LeetCode 371 | Sum of Two Integer | No +/- Operator | MANG Interview Prep | Easiest Explanation
LeetCode 29 | Divide Two Integers | Simple Explanation | Beats 100% | Pen And Paper | MAANG Prep
LeetCode 260 | Single Number III | Bit Manipulation Magic 🔥 MAANG Interview Question (Beats 100%)
LeetCode 137 | Single Number II | The Bit Trick Everyone Struggles With (Beats 100%)
LeetCode 1310 | XOR Queries of a Subarray | Beats 100% | Full Explanation + Code
LeetCode 762 - Prime Set Bits (Easy) | Bit Manipulation Trick You NEED to Know! 🔥
LeetCode 1720 | Decode XORed Array | Bit Manipulation & Array Reconstruction Explained | Pen & Paper
LeetCode 268 | Missing Number | O(1) Space & O(n) Time Solution Explained | Pen & Paper
Swap Two Numbers without a Temporary Variable | Explained Step-by-Step | Pen & Paper
LeetCode 338 | Counting Bits | Easy Bit Manipulation & DP Explained Step-by-Step | Pen & Paper
Smallest Power of 2 ≥ N (GeeksforGeeks) | Bit-Tricks Explained Step-by-Step | Pen & Paper
LeetCode 231| Power of Two | Easy Bit Manipulation Explained Step-by-Step | Pen & Paper
Check K-th Bit (Kth Bit) | Step-by-Step Solution & Interview Tips | Pen & Paper
LeetCode 190 | Reverse Bits | Bit Manipulation | Fast & Interview-Proven Solution | Pen & Paper
LeetCode 461 | Hamming Distance | Bit Manipulation | MAANG Preparation | Pen and Paper
LeetCode 136 | Single Number | Bit Manipulation | Basic Preparation | Pen and Paper
Odd or Even Using Bit Manipulation | MAANG Preparation | Pen and Paper
LeetCode 476 | Number Complement Explained | Bit Manipulation for MAANG Preparation | Pen and Paper
Set the Rightmost Unset Bit | Bit Basics | MAANG Interview Prep | Pen And Paper
Master Kth Bit | Check Bits Explained with Examples | MAANG Prep | Pen And Paper
Master Bitwise Operations in 10 Minutes | AND, OR, XOR, NOT, Shift Explained Simply | MAANG Prep
Bit Fundamentals | Bit, Byte, Signed, Unsigned, ASCII & Bitwise Operations | MAANG Prep
Bit Manipulation for MAANG Interviews — Easy & Intuitive Intro (Bitmask, XOR, LeetCode Prep)
LeetCode 2563 | Count Fair Pairs | Divide & Conquer | O(nlogn) | Optimal | MAANG Prep