Pen And Paper

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Access this for finding everything at one place: penpaperpreparation.com/ 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. 🎯 Subscribe now and hit the 🔔 bell icon so you never miss an interview-winning video!

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LeetCode 300 | Longest Increasing Subsequence | Tabular | DP | MAANG Preparation

LeetCode 300 | Longest Increasing Subsequence | Tabular | DP | MAANG Preparation Pen And Paper

11 views - 2 weeks ago

LeetCode 300 | Longest Increasing Subsequence | Memoization | DP | MAANG Preparation

LeetCode 300 | Longest Increasing Subsequence | Memoization | DP | MAANG Preparation Pen And Paper

34 views - 2 weeks ago

LeetCode 198 | House Robber | Dynamic Programming | Most Optimal | MAANG Preparation

LeetCode 198 | House Robber | Dynamic Programming | Most Optimal | MAANG Preparation Pen And Paper

26 views - 1 month ago

LeetCode 198 | House Robber | Dynamic Programming | Tabulation | MAANG Preparation

LeetCode 198 | House Robber | Dynamic Programming | Tabulation | MAANG Preparation Pen And Paper

30 views - 1 month ago

LeetCode 198 | House Robber | Dynamic Programming | Memoization | MAANG Preparation

LeetCode 198 | House Robber | Dynamic Programming | Memoization | MAANG Preparation Pen And Paper

16 views - 1 month ago

Subset Sum Problem Explained | DP | Most Optimal Solution | GFG | Easiest Explanation | MAANG Prep

Subset Sum Problem Explained | DP | Most Optimal Solution | GFG | Easiest Explanation | MAANG Prep Pen And Paper

7 views - 1 month ago

Subset Sum Problem Explained | DP | Memoization | GFG | Easiest Explanation | MAANG Prep

Subset Sum Problem Explained | DP | Memoization | GFG | Easiest Explanation | MAANG Prep Pen And Paper

40 views - 1 month ago

LeetCode 70 | Climbing Stairs | DP | Explained Simply | Top-Down & Bottom-Up | MAANG Prep

LeetCode 70 | Climbing Stairs | DP | Explained Simply | Top-Down & Bottom-Up | MAANG Prep Pen And Paper

43 views - 1 month ago

Fibonacci Number | Dynamic Programming | Intuition |Memoization, Tabulation | Must DO | MAANG Prep

Fibonacci Number | Dynamic Programming | Intuition |Memoization, Tabulation | Must DO | MAANG Prep Pen And Paper

49 views - 1 month ago

All About Dynamic Programming in One Video | DP Concepts, Types & Interview Strategy

All About Dynamic Programming in One Video | DP Concepts, Types & Interview Strategy Pen And Paper

49 views - 1 month ago

Dynamic Programming Introduction | Complete DP Roadmap for MAANG Interviews

Dynamic Programming Introduction | Complete DP Roadmap for MAANG Interviews Pen And Paper

162 views - 1 month ago

Bit Manipulation Masterclass in ONE Video | Crack Any MAANG Bit Question FAST

Bit Manipulation Masterclass in ONE Video | Crack Any MAANG Bit Question FAST Pen And Paper

192 views - 2 months ago

Leetcode 78 | Subsets | Bit Manipulation | Recursion | MAANG Interview Preparation | Pen And Paper

Leetcode 78 | Subsets | Bit Manipulation | Recursion | MAANG Interview Preparation | Pen And Paper Pen And Paper

42 views - 2 months ago

LeetCode 1915 | Number of Wonderful Substrings| MAANG Interview | Optimal Solution | BIT Mask |

LeetCode 1915 | Number of Wonderful Substrings| MAANG Interview | Optimal Solution | BIT Mask | Pen And Paper

44 views - 2 months ago

LeetCode 154 | Longest Awesome Substring | Best Bitmask Trick Explained Simply | MAANG Preparation

LeetCode 154 | Longest Awesome Substring | Best Bitmask Trick Explained Simply | MAANG Preparation Pen And Paper

40 views - 2 months ago

LeetCode 137 | Longest Substring with Vowels in Even Count | Bitmask + Basic | MANG Interview Prep

LeetCode 137 | Longest Substring with Vowels in Even Count | Bitmask + Basic | MANG Interview Prep Pen And Paper

55 views - 2 months ago

Leetcode 1318 | Minimum Flips | MAANG Preparation | Beats 100% | By Pen And Paper

Leetcode 1318 | Minimum Flips | MAANG Preparation | Beats 100% | By Pen And Paper Pen And Paper

38 views - 2 months ago

LeetCode 371 | Sum of Two Integer | No +/- Operator | MANG Interview Prep | Easiest Explanation

LeetCode 371 | Sum of Two Integer | No +/- Operator | MANG Interview Prep | Easiest Explanation Pen And Paper

21 views - 2 months ago

LeetCode 29 | Divide Two Integers | Simple Explanation | Beats 100% | Pen And Paper | MAANG Prep

LeetCode 29 | Divide Two Integers | Simple Explanation | Beats 100% | Pen And Paper | MAANG Prep Pen And Paper

45 views - 2 months ago

LeetCode 260 | Single Number III | Bit Manipulation Magic 🔥 MAANG Interview Question (Beats 100%)

LeetCode 260 | Single Number III | Bit Manipulation Magic 🔥 MAANG Interview Question (Beats 100%) Pen And Paper

49 views - 3 months ago

LeetCode 137 | Single Number II | The Bit Trick Everyone Struggles With (Beats 100%)

LeetCode 137 | Single Number II | The Bit Trick Everyone Struggles With (Beats 100%) Pen And Paper

119 views - 3 months ago

LeetCode 1310 | XOR Queries of a Subarray | Beats 100% | Full Explanation + Code

LeetCode 1310 | XOR Queries of a Subarray | Beats 100% | Full Explanation + Code Pen And Paper

13 views - 3 months ago

LeetCode 762 - Prime Set Bits (Easy) | Bit Manipulation Trick You NEED to Know! 🔥

LeetCode 762 - Prime Set Bits (Easy) | Bit Manipulation Trick You NEED to Know! 🔥 Pen And Paper

90 views - 3 months ago

LeetCode 1720 | Decode XORed Array | Bit Manipulation & Array Reconstruction Explained | Pen & Paper

LeetCode 1720 | Decode XORed Array | Bit Manipulation & Array Reconstruction Explained | Pen & Paper Pen And Paper

115 views - 3 months ago

LeetCode 268 | Missing Number | O(1) Space & O(n) Time Solution Explained | Pen & Paper

LeetCode 268 | Missing Number | O(1) Space & O(n) Time Solution Explained | Pen & Paper Pen And Paper

25 views - 3 months ago

Swap Two Numbers without a Temporary Variable | Explained Step-by-Step | Pen & Paper

Swap Two Numbers without a Temporary Variable | Explained Step-by-Step | Pen & Paper Pen And Paper

19 views - 3 months ago

LeetCode 338 | Counting Bits | Easy Bit Manipulation & DP Explained Step-by-Step | Pen & Paper

LeetCode 338 | Counting Bits | Easy Bit Manipulation & DP Explained Step-by-Step | Pen & Paper Pen And Paper

29 views - 3 months ago

Smallest Power of 2 ≥ N (GeeksforGeeks) | Bit-Tricks Explained Step-by-Step | Pen & Paper

Smallest Power of 2 ≥ N (GeeksforGeeks) | Bit-Tricks Explained Step-by-Step | Pen & Paper Pen And Paper

27 views - 3 months ago

LeetCode 231| Power of Two | Easy Bit Manipulation Explained Step-by-Step | Pen & Paper

LeetCode 231| Power of Two | Easy Bit Manipulation Explained Step-by-Step | Pen & Paper Pen And Paper

25 views - 3 months ago

Check K-th Bit (Kth Bit) | Step-by-Step Solution & Interview Tips | Pen & Paper

Check K-th Bit (Kth Bit) | Step-by-Step Solution & Interview Tips | Pen & Paper Pen And Paper

32 views - 3 months ago

LeetCode 190 | Reverse Bits | Bit Manipulation | Fast & Interview-Proven Solution | Pen & Paper

LeetCode 190 | Reverse Bits | Bit Manipulation | Fast & Interview-Proven Solution | Pen & Paper Pen And Paper

21 views - 3 months ago

LeetCode 461 | Hamming Distance | Bit Manipulation | MAANG Preparation | Pen and Paper

LeetCode 461 | Hamming Distance | Bit Manipulation | MAANG Preparation | Pen and Paper Pen And Paper

135 views - 4 months ago

LeetCode 136 | Single Number | Bit Manipulation | Basic Preparation | Pen and Paper

LeetCode 136 | Single Number | Bit Manipulation | Basic Preparation | Pen and Paper Pen And Paper

23 views - 4 months ago

Odd or Even Using Bit Manipulation | MAANG Preparation | Pen and Paper

Odd or Even Using Bit Manipulation | MAANG Preparation | Pen and Paper Pen And Paper

25 views - 4 months ago

LeetCode 476 | Number Complement Explained | Bit Manipulation for MAANG Preparation | Pen and Paper

LeetCode 476 | Number Complement Explained | Bit Manipulation for MAANG Preparation | Pen and Paper Pen And Paper

28 views - 4 months ago

Set the Rightmost Unset Bit | Bit Basics | MAANG Interview Prep | Pen And Paper

Set the Rightmost Unset Bit | Bit Basics | MAANG Interview Prep | Pen And Paper Pen And Paper

35 views - 4 months ago

Master Kth Bit | Check Bits Explained with Examples | MAANG Prep | Pen And Paper

Master Kth Bit | Check Bits Explained with Examples | MAANG Prep | Pen And Paper Pen And Paper

42 views - 4 months ago

Master Bitwise Operations in 10 Minutes | AND, OR, XOR, NOT, Shift Explained Simply | MAANG Prep

Master Bitwise Operations in 10 Minutes | AND, OR, XOR, NOT, Shift Explained Simply | MAANG Prep Pen And Paper

36 views - 4 months ago

Bit Fundamentals | Bit, Byte, Signed, Unsigned, ASCII & Bitwise Operations | MAANG Prep

Bit Fundamentals | Bit, Byte, Signed, Unsigned, ASCII & Bitwise Operations | MAANG Prep Pen And Paper

70 views - 4 months ago

Bit Manipulation for MAANG Interviews — Easy & Intuitive Intro (Bitmask, XOR, LeetCode Prep)

Bit Manipulation for MAANG Interviews — Easy & Intuitive Intro (Bitmask, XOR, LeetCode Prep) Pen And Paper

46 views - 4 months ago

LeetCode 2563 | Count Fair Pairs | Divide & Conquer | O(nlogn) | Optimal | MAANG Prep

LeetCode 2563 | Count Fair Pairs | Divide & Conquer | O(nlogn) | Optimal | MAANG Prep Pen And Paper

31 views - 4 months ago

Count Pairs with Sum Less Than Target | GFG | Sorting | Two Pointer | Pen and Paper | MAANG Prep

Count Pairs with Sum Less Than Target | GFG | Sorting | Two Pointer | Pen and Paper | MAANG Prep Pen And Paper

16 views - 4 months ago

LeetCode 2563 | Count Fair Pairs | Divide & Conquer | O(n(logn)^2) solution | MAANG Prep

LeetCode 2563 | Count Fair Pairs | Divide & Conquer | O(n(logn)^2) solution | MAANG Prep Pen And Paper

31 views - 4 months ago

LeetCode 493 | Reverse Pairs | Explained with Merge Sort | MAANG Prep | Pen Paper Preparation

LeetCode 493 | Reverse Pairs | Explained with Merge Sort | MAANG Prep | Pen Paper Preparation Pen And Paper

244 views - 4 months ago

Count Inversion Problem | Most Asked Divide & Conquer Question | Pen and Paper | GFG + MAANG Prep

Count Inversion Problem | Most Asked Divide & Conquer Question | Pen and Paper | GFG + MAANG Prep Pen And Paper

45 views - 4 months ago

LeetCode 912 | Sort an Array | Divide and Conquer Explained | Merge Sort | MAANG Preparation

LeetCode 912 | Sort an Array | Divide and Conquer Explained | Merge Sort | MAANG Preparation Pen And Paper

38 views - 4 months ago

Divide and Conquer Algorithm Explained | Paradigm, Examples & Patterns for Coding Interviews

Divide and Conquer Algorithm Explained | Paradigm, Examples & Patterns for Coding Interviews Pen And Paper

28 views - 4 months ago

LeetCode 2406 | Divide Intervals Into Minimum Number of Groups | MAANG Interview Prep |Pen and Paper

LeetCode 2406 | Divide Intervals Into Minimum Number of Groups | MAANG Interview Prep |Pen and Paper Pen And Paper

82 views - 4 months ago

Maximum Overlapping Intervals Problem | GeeksforGeeks | MAANG Interview Preparation (Pen and Paper)

Maximum Overlapping Intervals Problem | GeeksforGeeks | MAANG Interview Preparation (Pen and Paper) Pen And Paper

185 views - 4 months ago

LeetCode 2580 | Count Ways to Group Overlapping Ranges | Easy Explanation | Pen & Paper | MAANG Prep

LeetCode 2580 | Count Ways to Group Overlapping Ranges | Easy Explanation | Pen & Paper | MAANG Prep Pen And Paper

19 views - 4 months ago

LeetCode 452 | Minimum Number of Arrows to Burst Balloons | Greedy | Pen & Paper MAANG Prep

LeetCode 452 | Minimum Number of Arrows to Burst Balloons | Greedy | Pen & Paper MAANG Prep Pen And Paper

65 views - 4 months ago

Meeting Rooms II | Minimum Conference Rooms Required | Pen & Paper MAANG Interview Prep

Meeting Rooms II | Minimum Conference Rooms Required | Pen & Paper MAANG Interview Prep Pen And Paper

88 views - 4 months ago

LeetCode 3169 | Count Days Without Meetings | Interval Merging + Sorting | Pen & Paper MAANG Prep

LeetCode 3169 | Count Days Without Meetings | Interval Merging + Sorting | Pen & Paper MAANG Prep Pen And Paper

51 views - 4 months ago

Activity Selection Problem | Greedy Algorithm Explained | Pen & Paper MAANG Prep

Activity Selection Problem | Greedy Algorithm Explained | Pen & Paper MAANG Prep Pen And Paper

78 views - 5 months ago

LeetCode 986 | Interval List Intersections | Two Pointers Explained | Pen & Paper MAANG Prep

LeetCode 986 | Interval List Intersections | Two Pointers Explained | Pen & Paper MAANG Prep Pen And Paper

30 views - 5 months ago

LeetCode 435 | Non-overlapping Intervals | Greedy + Sorting Solution | MAANG Interview Prep

LeetCode 435 | Non-overlapping Intervals | Greedy + Sorting Solution | MAANG Interview Prep Pen And Paper

38 views - 5 months ago

Meeting Rooms | Rooms Needed | Greedy & Priority Queue Solution | MAANG Interview Prep

Meeting Rooms | Rooms Needed | Greedy & Priority Queue Solution | MAANG Interview Prep Pen And Paper

32 views - 5 months ago

LeetCode 57 | Insert Interval | Ultimate Explanation + Code | MAANG Preparation

LeetCode 57 | Insert Interval | Ultimate Explanation + Code | MAANG Preparation Pen And Paper

51 views - 5 months ago

LeetCode 495 | Teemo Attacking | Ultimate Explanation + Code | MAANG Preparation

LeetCode 495 | Teemo Attacking | Ultimate Explanation + Code | MAANG Preparation Pen And Paper

112 views - 5 months ago

LeetCode 56 | Merge Intervals | Ultimate Explanation + Code | MAANG Preparation

LeetCode 56 | Merge Intervals | Ultimate Explanation + Code | MAANG Preparation Pen And Paper

45 views - 5 months ago