LLM

#126 Breaking Down Byte Pair Encoding: The Mathematics of Subword Tokenization 🧮

#125 Deep Dive Book Review: AI Engineering by Chip Huyen 🤖

#117 🤯🤖 The AI Rollercoaster of 2025: A Week of Insane Innovations! 🚀🧠

NLP

#126 Breaking Down Byte Pair Encoding: The Mathematics of Subword Tokenization 🧮

Algorithms

#126 Breaking Down Byte Pair Encoding: The Mathematics of Subword Tokenization 🧮

Machine Learning

#126 Breaking Down Byte Pair Encoding: The Mathematics of Subword Tokenization 🧮

#122 Decoding Machine Learning Success: 10 Insights from Andrew Ng's Machine Learning Yearning 🚀🧠

Data Science

#126 Breaking Down Byte Pair Encoding: The Mathematics of Subword Tokenization 🧮

System Design

#125 Deep Dive Book Review: AI Engineering by Chip Huyen 🤖

MLOps

#125 Deep Dive Book Review: AI Engineering by Chip Huyen 🤖

RAG

#125 Deep Dive Book Review: AI Engineering by Chip Huyen 🤖

Fine-Tuning

#125 Deep Dive Book Review: AI Engineering by Chip Huyen 🤖

Architecture

#125 Deep Dive Book Review: AI Engineering by Chip Huyen 🤖

AGI

#124 When AGI Finds Fire — A Story About Energy, Evolution and the Future of Intelligence 🔥🤖⚡

Energy

#124 When AGI Finds Fire — A Story About Energy, Evolution and the Future of Intelligence 🔥🤖⚡

Datacenters

#124 When AGI Finds Fire — A Story About Energy, Evolution and the Future of Intelligence 🔥🤖⚡

Sustainability

#124 When AGI Finds Fire — A Story About Energy, Evolution and the Future of Intelligence 🔥🤖⚡

Evolution

#124 When AGI Finds Fire — A Story About Energy, Evolution and the Future of Intelligence 🔥🤖⚡

AI

#123 Why This Is the Decade of Agents (Not the Year) 🧠🚀

#122 Decoding Machine Learning Success: 10 Insights from Andrew Ng's Machine Learning Yearning 🚀🧠

#117 🤯🤖 The AI Rollercoaster of 2025: A Week of Insane Innovations! 🚀🧠

Agents

#123 Why This Is the Decade of Agents (Not the Year) 🧠🚀

LLMs

#123 Why This Is the Decade of Agents (Not the Year) 🧠🚀

Education

#123 Why This Is the Decade of Agents (Not the Year) 🧠🚀

Stock Analysis

#121 5 U.S. Stocks That Could Double in a Year — And Why I'm Betting on Them 🚀🧠

A/B Test

#120 A/B Test - Deep dive 🚀🧠

Economic Cycles

#119 🌍 The Changing World Order: 500 Years of Empire Cycles and What They Mean for Us! 🚀🧠

Geopolitics

#119 🌍 The Changing World Order: 500 Years of Empire Cycles and What They Mean for Us! 🚀🧠

Global Economy

#119 🌍 The Changing World Order: 500 Years of Empire Cycles and What They Mean for Us! 🚀🧠

Databricks

#118 🧱 Databricks Review: The Good, The Bad & The Future of Unified Analytics 🚀🧠

GenAI

#117 🤯🤖 The AI Rollercoaster of 2025: A Week of Insane Innovations! 🚀🧠

EE2E

#116 ☁️ The UK Wants a Backdoor into Your iCloud 🚀🧠

Hash Table

#115 📦 2349. Design a Number Container System 🚀🧠

Design

#115 📦 2349. Design a Number Container System 🚀🧠

#17 1381. Design a Stack With Increment Operation 🚀

#14 432. All O`one Data Structure 🧠💡

#13 641. Design Circular Deque 🚀

#11 731. My Calendar II 🚀

#8 729. My Calendar I 🚀

Heap (Priority Queue)

#115 📦 2349. Design a Number Container System 🚀🧠

#112 💧 407. Trapping Rain Water II 🚀🧠

#111 💰💸 1368. Minimum Cost to Make at Least One Valid Path in a Grid 🚀🧠

#103 📈 1792. Maximum Average Pass Ratio 🚀🧠

#102 2593. Find Score of an Array After Marking All Elements 🚀🧠

#100 📆 2054. Two Best Non-Overlapping Events 🚀🧠

#91 🗺️ 2577. Minimum Time to Visit a Cell In a Grid 🚀🧠

#90 🚧 2290. Minimum Obstacle Removal to Reach Corner 🚀🧠

#77 🔢📏 862. Shortest Subarray with Sum at Least K 🧠🚀

#42 2938. Longest Happy String 🧠🚀

#40 2530. Maximal Score After Applying K Operations 🧠🚀

#38 632. Smallest Range Covering Elements from K Lists 🧠🚀

#37 2406. Divide Intervals Into Minimum Number of Groups 🧠🚀

#31 1942. The Number of the Smallest Unoccupied Chair 🪑 🧠🚀

Ordered Set

#115 📦 2349. Design a Number Container System 🚀🧠

#11 731. My Calendar II 🚀

#8 729. My Calendar I 🚀

Array

#114 🗺️ 1765. Map of Highest Peak 🚀🧠

#113 ⊹ 2017. Grid Game 🚀🧠

#112 💧 407. Trapping Rain Water II 🚀🧠

#111 💰💸 1368. Minimum Cost to Make at Least One Valid Path in a Grid 🚀🧠

#108 🔢 1639. Number of Ways to Form a Target String Given a Dictionary 🚀🧠

#107 1014. Best Sightseeing Pair 🚀🧠

#103 📈 1792. Maximum Average Pass Ratio 🚀🧠

#102 2593. Find Score of an Array After Marking All Elements 🚀🧠

#101 😍 2779. Maximum Beauty of an Array After Applying Operation 🚀🧠

#100 📆 2054. Two Best Non-Overlapping Events 🚀🧠

#99 1760. Minimum Limit of Balls in a Bag 🚀🧠

#98 2554. Maximum Number of Integers to Choose From a Range I 🚀🧠

#95 📝 2109. Adding Spaces to a String 🚀🧠

#91 🗺️ 2577. Minimum Time to Visit a Cell In a Grid 🚀🧠

#90 🚧 2290. Minimum Obstacle Removal to Reach Corner 🚀🧠

#88 🛣️🚗 3243. Shortest Distance After Road Addition Queries I 🚀🧠

#86 🧩 773. Sliding Puzzle 🚀🧠

#85 📈 1975. Maximum Matrix Sum 🚀🧠

#84 🔄 1861. Rotating the Box 🧠🚀

#83 0️⃣1️⃣→1️⃣0️⃣ 1072. Flip Columns For Maximum Number of Equal Rows 🧠🚀

#82 🛡️ 2257. Count Unguarded Cells in the Grid 🧠🚀

#80 📏🧮 2461. Maximum Sum of Distinct Subarrays With Length K 🧠🚀

#79 💣 1652. Defuse the Bomb 🧠🚀

#77 🔢📏 862. Shortest Subarray with Sum at Least K 🧠🚀

#76 🔢 3254. Find the Power of K-Size Subarrays I 🧠🚀

#75 🔢 1574. Shortest Subarray to be Removed to Make Array Sorted 🧠🚀

#74 🚚📦 2064. Minimized Maximum of Products Distributed to Any Store 🧠🚀

#73 🧮 2563. Count the Number of Fair Pairs 🧠🚀

#72 💎 2070. Most Beautiful Item for Each Query 🧠🚀

#84 🔄 1861. Rotating the Box 🧠🚀

#70 0️⃣0️⃣1️⃣0️⃣ 3097. Shortest Subarray With OR at Least K II 🧠🚀

#68 0️⃣0️⃣1️⃣0️⃣ 1829. Maximum XOR for Each Query 🧠🚀

#67 0️⃣1️⃣ 2275. Largest Combination With Bitwise AND Greater Than Zero 🧠🚀

#66 🔁 3011. Find if Array Can Be Sorted 🧠🚀

#60 🏁 2463. Minimum Total Distance Traveled 🧠🚀

#58 ⛰️ 1671. Minimum Number of Removals to Make Mountain Array 🧠🚀

#57 2684. Maximum Number of Moves in a Grid 🧠🚀

#56 2501. Longest Square Streak in an Array 🧠🚀

#55 📐📏 1277. Count Square Submatrices with All Ones 🧠🚀

#54 🌳 2458. Height of Binary Tree After Subtree Removal Queries 🧠🚀

#53 📂✨ 1233. Remove Sub-Folders from the Filesystem 🧠🚀

#45 2044. Count Number of Maximum Bitwise-OR Subsets 🧠🚀

#43 🌳 427. Construct Quad Tree 🧠🚀

#40 2530. Maximal Score After Applying K Operations 🧠🚀

#38 632. Smallest Range Covering Elements from K Lists 🧠🚀

#37 2406. Divide Intervals Into Minimum Number of Groups 🧠🚀

#31 1942. The Number of the Smallest Unoccupied Chair 🪑 🧠🚀

#30 962. Maximum Width Ramp 🧠🚀

#26 1813. Sentence Similarity III 🧠🚀

#23 2491. Divide Players Into Teams of Equal Skill 🧠🚀

#21 1590. 🧮 Make Sum Divisible by P Using the Smallest Subarray Removal 🚀

#19 1331. Rank Transform of an Array 🚀

#18 1497. Check If Array Pairs Are Divisible by k 🚀

#17 1381. Design a Stack With Increment Operation 🚀

#13 641. Design Circular Deque 🚀

#11 731. My Calendar II 🚀

#8 729. My Calendar I 🚀

#5 2416. Sum of Prefix Scores of Strings 🚀

#2 3043. Find the Length of the Longest Common Prefix 🚀

Breadth-First Search

#114 🗺️ 1765. Map of Highest Peak 🚀🧠

#112 💧 407. Trapping Rain Water II 🚀🧠

#111 💰💸 1368. Minimum Cost to Make at Least One Valid Path in a Grid 🚀🧠

#106 🎄 515. Find Largest Value in Each Tree Row 🚀🧠

#105 🌳 3203. Find Minimum Diameter After Merging Two Trees 🚀🧠

#104 🌳 2471. Minimum Number of Operations to Sort a Binary Tree by Level 🚀🧠

#91 🗺️ 2577. Minimum Time to Visit a Cell In a Grid 🚀🧠

#90 🚧 2290. Minimum Obstacle Removal to Reach Corner 🚀🧠

#88 🛣️🚗 3243. Shortest Distance After Road Addition Queries I 🚀🧠

#86 🧩 773. Sliding Puzzle 🚀🧠

#54 🌳 2458. Height of Binary Tree After Subtree Removal Queries 🧠🚀

#50 🔍🌳 2641. Cousins in Binary Tree II 🧠🚀

Matrix

#114 🗺️ 1765. Map of Highest Peak 🚀🧠

#113 ⊹ 2017. Grid Game 🚀🧠

#112 💧 407. Trapping Rain Water II 🚀🧠

#111 💰💸 1368. Minimum Cost to Make at Least One Valid Path in a Grid 🚀🧠

#91 🗺️ 2577. Minimum Time to Visit a Cell In a Grid 🚀🧠

#90 🚧 2290. Minimum Obstacle Removal to Reach Corner 🚀🧠

#86 🧩 773. Sliding Puzzle 🚀🧠

#85 📈 1975. Maximum Matrix Sum 🚀🧠

#84 🔄 1861. Rotating the Box 🧠🚀

#83 0️⃣1️⃣→1️⃣0️⃣ 1072. Flip Columns For Maximum Number of Equal Rows 🧠🚀

#82 🛡️ 2257. Count Unguarded Cells in the Grid 🧠🚀

#57 2684. Maximum Number of Moves in a Grid 🧠🚀

#55 📐📏 1277. Count Square Submatrices with All Ones 🧠🚀

#43 🌳 427. Construct Quad Tree 🧠🚀

Prefix Sum

#113 ⊹ 2017. Grid Game 🚀🧠

#77 🔢📏 862. Shortest Subarray with Sum at Least K 🧠🚀

#68 0️⃣0️⃣1️⃣0️⃣ 1829. Maximum XOR for Each Query 🧠🚀

#37 2406. Divide Intervals Into Minimum Number of Groups 🧠🚀

#21 1590. 🧮 Make Sum Divisible by P Using the Smallest Subarray Removal 🚀

#11 731. My Calendar II 🚀

Graph

#111 💰💸 1368. Minimum Cost to Make at Least One Valid Path in a Grid 🚀🧠

#105 🌳 3203. Find Minimum Diameter After Merging Two Trees 🚀🧠

#92 2097. Valid Arrangement of Pairs 🚀🧠

#91 🗺️ 2577. Minimum Time to Visit a Cell In a Grid 🚀🧠

#90 🚧 2290. Minimum Obstacle Removal to Reach Corner 🚀🧠

#88 🛣️🚗 3243. Shortest Distance After Road Addition Queries I 🚀🧠

#87 🏆 2924. Find Champion II 🚀🧠

Shortest Path

#111 💰💸 1368. Minimum Cost to Make at Least One Valid Path in a Grid 🚀🧠

#91 🗺️ 2577. Minimum Time to Visit a Cell In a Grid 🚀🧠

#90 🚧 2290. Minimum Obstacle Removal to Reach Corner 🚀🧠

Greedy

#110 1️⃣1️⃣0️⃣ 2429. Minimize XOR 🚀🧠

#103 📈 1792. Maximum Average Pass Ratio 🚀🧠

#102 2593. Find Score of an Array After Marking All Elements 🚀🧠

#98 2554. Maximum Number of Integers to Choose From a Range I 🚀🧠

#85 📈 1975. Maximum Matrix Sum 🚀🧠

#84 🔄 1861. Rotating the Box 🧠🚀

#58 ⛰️ 1671. Minimum Number of Removals to Make Mountain Array 🧠🚀

#44 670. Maximum Swap 🧠🚀

#42 2938. Longest Happy String 🧠🚀

#41 2938. ⚫⚪ Separate Black and White Balls: Efficient Grouping with Minimal Swaps 🧠🚀

#40 2530. Maximal Score After Applying K Operations 🧠🚀

#38 632. Smallest Range Covering Elements from K Lists 🧠🚀

#37 2406. Divide Intervals Into Minimum Number of Groups 🧠🚀

#29 921. Minimum Add to Make Parentheses Valid 🧠🚀

#28 1963. Minimum Number of Swaps to Make the String Balanced 🧠🚀

Bit Manipulation

#110 1️⃣1️⃣0️⃣ 2429. Minimize XOR 🚀🧠

#70 0️⃣0️⃣1️⃣0️⃣ 3097. Shortest Subarray With OR at Least K II 🧠🚀

#69 0️⃣0️⃣1️⃣0️⃣ 3133. Minimum Array End 🧠🚀

#68 0️⃣0️⃣1️⃣0️⃣ 1829. Maximum XOR for Each Query 🧠🚀

#67 0️⃣1️⃣ 2275. Largest Combination With Bitwise AND Greater Than Zero 🧠🚀

#66 🔁 3011. Find if Array Can Be Sorted 🧠🚀

#45 2044. Count Number of Maximum Bitwise-OR Subsets 🧠🚀

String

#109 🔢 2466. Count Ways To Build Good Strings 🚀🧠

#97 🧩 2337. Move Pieces to Obtain a String 🚀🧠

#96 📝 2825. Make String a Subsequence Using Cyclic Increments 🚀🧠

#95 📝 2109. Adding Spaces to a String 🚀🧠

#94 📝 1455. Check If a Word Occurs As a Prefix of Any Word in a Sentence 🚀🧠

#81 📏🧮 2516. Take K of Each Character From Left and Right 🧠🚀

#65 🧩 2914. Minimum Number of Changes to Make Binary String Beautiful 🧠🚀

#64 🔍 3163. String Compression III 🧠🚀

#63 🔄 796. Rotate String 🧠🚀

#62 🌀 2490. Circular Sentence 🧠🚀

#61 1957. Delete Characters to Make Fancy String 🧠🚀

#53 📂✨ 1233. Remove Sub-Folders from the Filesystem 🧠🚀

#49 🔍🌳 1106. Parsing A Boolean Expression 🧠🚀

#48 1593. Split a String Into the Max Number of Unique Substrings 🧠🚀

#47 1106. Parsing A Boolean Expression 🧠🚀

#46 1545. Find Kth Bit in Nth Binary String 🧠🚀

#42 2938. Longest Happy String 🧠🚀

#41 2938. ⚫⚪ Separate Black and White Balls: Efficient Grouping with Minimal Swaps 🧠🚀

#29 921. Minimum Add to Make Parentheses Valid 🧠🚀

#28 1963. Minimum Number of Swaps to Make the String Balanced 🧠🚀

#27 2696. Minimum String Length After Removing Substrings 🧠🚀

#26 1813. Sentence Similarity III 🧠🚀

#24 567. Permutation in String 🧠🚀

#5 2416. Sum of Prefix Scores of Strings 🚀

#2 3043. Find the Length of the Longest Common Prefix 🚀

Dynamic Programming

#109 🔢 2466. Count Ways To Build Good Strings 🚀🧠

#108 🔢 1639. Number of Ways to Form a Target String Given a Dictionary 🚀🧠

#107 1014. Best Sightseeing Pair 🚀🧠

#102 2593. Find Score of an Array After Marking All Elements 🚀🧠

#100 📆 2054. Two Best Non-Overlapping Events 🚀🧠

#60 🏁 2463. Minimum Total Distance Traveled 🧠🚀

#58 ⛰️ 1671. Minimum Number of Removals to Make Mountain Array 🧠🚀

#57 2684. Maximum Number of Moves in a Grid 🧠🚀

#56 2501. Longest Square Streak in an Array 🧠🚀

#55 📐📏 1277. Count Square Submatrices with All Ones 🧠🚀

Tree

#106 🎄 515. Find Largest Value in Each Tree Row 🚀🧠

#105 🌳 3203. Find Minimum Diameter After Merging Two Trees 🚀🧠

#104 🌳 2471. Minimum Number of Operations to Sort a Binary Tree by Level 🚀🧠

#54 🌳 2458. Height of Binary Tree After Subtree Removal Queries 🧠🚀

#51 🌳 951. Flip Equivalent Binary Trees 🧠🚀

#50 🔍🌳 2641. Cousins in Binary Tree II 🧠🚀

#43 🌳 427. Construct Quad Tree 🧠🚀

Depth-First Search

#106 🎄 515. Find Largest Value in Each Tree Row 🚀🧠

#92 2097. Valid Arrangement of Pairs 🚀🧠

#54 🌳 2458. Height of Binary Tree After Subtree Removal Queries 🧠🚀

#53 📂✨ 1233. Remove Sub-Folders from the Filesystem 🧠🚀

#51 🌳 951. Flip Equivalent Binary Trees 🧠🚀

#50 🔍🌳 2641. Cousins in Binary Tree II 🧠🚀

Binary Tree

#106 🎄 515. Find Largest Value in Each Tree Row 🚀🧠

#104 🌳 2471. Minimum Number of Operations to Sort a Binary Tree by Level 🚀🧠

#54 🌳 2458. Height of Binary Tree After Subtree Removal Queries 🧠🚀

#51 🌳 951. Flip Equivalent Binary Trees 🧠🚀

#50 🔍🌳 2641. Cousins in Binary Tree II 🧠🚀

Depth-First Tree

#105 🌳 3203. Find Minimum Diameter After Merging Two Trees 🚀🧠

Sorting

#102 2593. Find Score of an Array After Marking All Elements 🚀🧠

#101 😍 2779. Maximum Beauty of an Array After Applying Operation 🚀🧠

#100 📆 2054. Two Best Non-Overlapping Events 🚀🧠

#98 2554. Maximum Number of Integers to Choose From a Range I 🚀🧠

#93 1346. Check If N and Its Double Exist 🚀🧠

#73 🧮 2563. Count the Number of Fair Pairs 🧠🚀

#72 💎 2070. Most Beautiful Item for Each Query 🧠🚀

#66 🔁 3011. Find if Array Can Be Sorted 🧠🚀

#60 🏁 2463. Minimum Total Distance Traveled 🧠🚀

#56 2501. Longest Square Streak in an Array 🧠🚀

#38 632. Smallest Range Covering Elements from K Lists 🧠🚀

#37 2406. Divide Intervals Into Minimum Number of Groups 🧠🚀

#23 2491. Divide Players Into Teams of Equal Skill 🧠🚀

#19 1331. Rank Transform of an Array 🚀

Simulation

#102 2593. Find Score of an Array After Marking All Elements 🚀🧠

#95 📝 2109. Adding Spaces to a String 🚀🧠

#82 🛡️ 2257. Count Unguarded Cells in the Grid 🧠🚀

#46 1545. Find Kth Bit in Nth Binary String 🧠🚀

#27 2696. Minimum String Length After Removing Substrings 🧠🚀

Two Pointers

#102 2593. Find Score of an Array After Marking All Elements 🚀🧠

#97 🧩 2337. Move Pieces to Obtain a String 🚀🧠

#96 📝 2825. Make String a Subsequence Using Cyclic Increments 🚀🧠

#95 📝 2109. Adding Spaces to a String 🚀🧠

#94 📝 1455. Check If a Word Occurs As a Prefix of Any Word in a Sentence 🚀🧠

#93 1346. Check If N and Its Double Exist 🚀🧠

#84 🔄 1861. Rotating the Box 🧠🚀

#75 🔢 1574. Shortest Subarray to be Removed to Make Array Sorted 🧠🚀

#73 🧮 2563. Count the Number of Fair Pairs 🧠🚀

#41 2938. ⚫⚪ Separate Black and White Balls: Efficient Grouping with Minimal Swaps 🧠🚀

#37 2406. Divide Intervals Into Minimum Number of Groups 🧠🚀

#28 1963. Minimum Number of Swaps to Make the String Balanced 🧠🚀

#26 1813. Sentence Similarity III 🧠🚀

#24 567. Permutation in String 🧠🚀

#23 2491. Divide Players Into Teams of Equal Skill 🧠🚀

Queue

#102 2593. Find Score of an Array After Marking All Elements 🚀🧠

#77 🔢📏 862. Shortest Subarray with Sum at Least K 🧠🚀

#13 641. Design Circular Deque 🚀

Divide and Conquer

#102 2593. Find Score of an Array After Marking All Elements 🚀🧠

#43 🌳 427. Construct Quad Tree 🧠🚀

Binary Search

#101 😍 2779. Maximum Beauty of an Array After Applying Operation 🚀🧠

#100 📆 2054. Two Best Non-Overlapping Events 🚀🧠

#99 1760. Minimum Limit of Balls in a Bag 🚀🧠

#98 2554. Maximum Number of Integers to Choose From a Range I 🚀🧠

#93 1346. Check If N and Its Double Exist 🚀🧠

#77 🔢📏 862. Shortest Subarray with Sum at Least K 🧠🚀

#75 🔢 1574. Shortest Subarray to be Removed to Make Array Sorted 🧠🚀

#74 🚚📦 2064. Minimized Maximum of Products Distributed to Any Store 🧠🚀

#73 🧮 2563. Count the Number of Fair Pairs 🧠🚀

#72 💎 2070. Most Beautiful Item for Each Query 🧠🚀

#84 🔄 1861. Rotating the Box 🧠🚀

#58 ⛰️ 1671. Minimum Number of Removals to Make Mountain Array 🧠🚀

#56 2501. Longest Square Streak in an Array 🧠🚀

#11 731. My Calendar II 🚀

#8 729. My Calendar I 🚀

Sliding Window

#101 😍 2779. Maximum Beauty of an Array After Applying Operation 🚀🧠

#81 📏🧮 2516. Take K of Each Character From Left and Right 🧠🚀

#80 📏🧮 2461. Maximum Sum of Distinct Subarrays With Length K 🧠🚀

#79 💣 1652. Defuse the Bomb 🧠🚀

#77 🔢📏 862. Shortest Subarray with Sum at Least K 🧠🚀

#76 🔢 3254. Find the Power of K-Size Subarrays I 🧠🚀

#70 0️⃣0️⃣1️⃣0️⃣ 3097. Shortest Subarray With OR at Least K II 🧠🚀

#38 632. Smallest Range Covering Elements from K Lists 🧠🚀

#24 567. Permutation in String 🧠🚀

HashTable

#98 2554. Maximum Number of Integers to Choose From a Range I 🚀🧠

#83 0️⃣1️⃣→1️⃣0️⃣ 1072. Flip Columns For Maximum Number of Equal Rows 🧠🚀

#81 📏🧮 2516. Take K of Each Character From Left and Right 🧠🚀

#80 📏🧮 2461. Maximum Sum of Distinct Subarrays With Length K 🧠🚀

#67 0️⃣1️⃣ 2275. Largest Combination With Bitwise AND Greater Than Zero 🧠🚀

#56 2501. Longest Square Streak in an Array 🧠🚀

#50 🔍🌳 2641. Cousins in Binary Tree II 🧠🚀

#48 1593. Split a String Into the Max Number of Unique Substrings 🧠🚀

#38 632. Smallest Range Covering Elements from K Lists 🧠🚀

#31 1942. The Number of the Smallest Unoccupied Chair 🪑 🧠🚀

#24 567. Permutation in String 🧠🚀

#23 2491. Divide Players Into Teams of Equal Skill 🧠🚀

#21 1590. 🧮 Make Sum Divisible by P Using the Smallest Subarray Removal 🚀

#19 1331. Rank Transform of an Array 🚀

#18 1497. Check If Array Pairs Are Divisible by k 🚀

#14 432. All O`one Data Structure 🧠💡

#2 3043. Find the Length of the Longest Common Prefix 🚀

String Matching

#94 📝 1455. Check If a Word Occurs As a Prefix of Any Word in a Sentence 🚀🧠

#63 🔄 796. Rotate String 🧠🚀

Array HashTable

#93 1346. Check If N and Its Double Exist 🚀🧠

Eulerian Circuit

#92 2097. Valid Arrangement of Pairs 🚀🧠

GCP

#89 🔗 Connect Bitbucket to Dataform 🚀🧠

Monotonic Queue

#77 🔢📏 862. Shortest Subarray with Sum at Least K 🧠🚀

Stack

#75 🔢 1574. Shortest Subarray to be Removed to Make Array Sorted 🧠🚀

#49 🔍🌳 1106. Parsing A Boolean Expression 🧠🚀

#47 1106. Parsing A Boolean Expression 🧠🚀

#30 962. Maximum Width Ramp 🧠🚀

#29 921. Minimum Add to Make Parentheses Valid 🧠🚀

#28 1963. Minimum Number of Swaps to Make the String Balanced 🧠🚀

#27 2696. Minimum String Length After Removing Substrings 🧠🚀

#17 1381. Design a Stack With Increment Operation 🚀

Monotonic Stack

#75 🔢 1574. Shortest Subarray to be Removed to Make Array Sorted 🧠🚀

#30 962. Maximum Width Ramp 🧠🚀

Math

#84 🔄 1861. Rotating the Box 🧠🚀

#44 670. Maximum Swap 🧠🚀

Number Theory

#84 🔄 1861. Rotating the Box 🧠🚀

Counting

#67 0️⃣1️⃣ 2275. Largest Combination With Bitwise AND Greater Than Zero 🧠🚀

#18 1497. Check If Array Pairs Are Divisible by k 🚀

#5 2416. Sum of Prefix Scores of Strings 🚀

Trie

#53 📂✨ 1233. Remove Sub-Folders from the Filesystem 🧠🚀

#5 2416. Sum of Prefix Scores of Strings 🚀

#2 3043. Find the Length of the Longest Common Prefix 🚀

Recursion

#49 🔍🌳 1106. Parsing A Boolean Expression 🧠🚀

#47 1106. Parsing A Boolean Expression 🧠🚀

#46 1545. Find Kth Bit in Nth Binary String 🧠🚀

Backtracking

#48 1593. Split a String Into the Max Number of Unique Substrings 🧠🚀

#45 2044. Count Number of Maximum Bitwise-OR Subsets 🧠🚀

Enumeration

#45 2044. Count Number of Maximum Bitwise-OR Subsets 🧠🚀

Linked List

#14 432. All O`one Data Structure 🧠💡

#13 641. Design Circular Deque 🚀

Doubly-Linked List

#14 432. All O`one Data Structure 🧠💡

Segment Tree

#11 731. My Calendar II 🚀

#8 729. My Calendar I 🚀