base on Awesome LeetCode resources to learn Data Structures and Algorithms and prepare for Coding Interviews. <p align="center"> <img src="images/leetcode-repo-logo.png" width="350" height="200"> </p> <p align="center"> <a href="https://blog.algomaster.io/">Join Free Newsletter</a> </p> This repository contains awesome LeetCode resources to learn Data Structures and Algorithms (DSA) and prepare for Coding interviews. If you want to practice curated list of LeetCode problems organized by patterns, checkout [AlgoMaster.io](https://algomaster.io) ## 💡 Tips - [How I Mastered DSA](https://blog.algomaster.io/p/how-i-mastered-data-structures-and-algorithms) - [How to Start LeetCode](https://blog.algomaster.io/p/how-to-start-leetcode-in-2025) - [15 Leetcode Patterns](https://blog.algomaster.io/p/15-leetcode-patterns) ## 📌 Fundamental Concepts - [Algorithmic Complexity](https://blog.algomaster.io/p/57bd4963-462f-4294-a972-4012691fc729) - [Big-O Cheat Sheet](https://www.bigocheatsheet.com/) - [Bit Manipulation Techniques](https://blog.algomaster.io/p/c650df76-f978-46ee-a572-eb13c354905d) - [Sorting Algorithms](https://medium.com/jl-codes/understanding-sorting-algorithms-af6222995c8) - [Linked List](https://leetcode.com/discuss/study-guide/1800120/become-master-in-linked-list) - [Dummy Node Technique](https://blog.algomaster.io/p/5d7a1368-7a0c-461a-93a9-732333ceb2a8) - [Queues](https://medium.com/basecs/to-queue-or-not-to-queue-2653bcde5b04) - [Stacks](https://medium.com/basecs/stacks-and-overflows-dbcf7854dc67) - [Hash Tables](https://medium.com/basecs/taking-hash-tables-off-the-shelf-139cbf4752f0) - [Heaps](https://medium.com/basecs/learning-to-love-heaps-cef2b273a238) - [Recursion](https://leetcode.com/discuss/study-guide/1733447/become-master-in-recursion) - [Backtracking](https://medium.com/algorithms-and-leetcode/backtracking-e001561b9f28) - [Trees](https://leetcode.com/discuss/study-guide/1820334/Become-Master-in-Tree) - [Tries](https://medium.com/basecs/trying-to-understand-tries-3ec6bede0014) - [Binary Search](https://leetcode.com/discuss/study-guide/786126/Python-Powerful-Ultimate-Binary-Search-Template.-Solved-many-problems) - [Greedy Algorithm](https://www.freecodecamp.org/news/greedy-algorithms/) - [Dynamic Programming](https://medium.com/basecs/less-repetition-more-dynamic-programming-43d29830a630) - [Graph Theory](https://medium.com/basecs/a-gentle-introduction-to-graph-theory-77969829ead8) - [Important Graph Algorithms](https://blog.algomaster.io/p/master-graph-algorithms-for-coding) - [DFS Traversal](https://medium.com/basecs/deep-dive-through-a-graph-dfs-traversal-8177df5d0f13) - [BFS Traversal](https://medium.com/basecs/going-broad-in-a-graph-bfs-traversal-959bd1a09255) - [Union-Find](https://leetcode.com/discuss/general-discussion/1072418/Disjoint-Set-Union-(DSU)Union-Find-A-Complete-Guide) - [Dijkstra Algorithm](https://leetcode.com/discuss/study-guide/1059477/A-guide-to-Dijkstra's-Algorithm) - [Minimum Spanning Tree](https://www.hackerearth.com/practice/algorithms/graphs/minimum-spanning-tree/tutorial/) ## 🚀 Patterns - [15 Leetcode Patterns](https://blog.algomaster.io/p/15-leetcode-patterns) - [20 DP Patterns](https://blog.algomaster.io/p/20-patterns-to-master-dynamic-programming) - [Two Pointers Pattern](https://www.youtube.com/watch?v=QzZ7nmouLTI) - [Sliding Window Pattern](https://blog.algomaster.io/p/f4412a17-7a3a-4d0b-8e39-9ea8f429bf7c) - [Prefix Sum Pattern](https://www.youtube.com/watch?v=yuws7YK0Yng) - [Fast and Slow Pointers Pattern](https://www.youtube.com/watch?v=b139yf7Ik-E) - [Top 'K' Elements Pattern](https://www.youtube.com/watch?v=6_v6OoxvMOE) - [Kadane's Algorithm](https://www.youtube.com/watch?v=NUWAXbSlsws) - [Sliding Window Pattern](https://www.youtube.com/watch?v=y2d0VHdvfdc) - [Linked List In-place Reversal Pattern](https://www.youtube.com/watch?v=auoTGovuo9A) - [Monotonic Stack Pattern](https://www.youtube.com/watch?v=DtJVwbbicjQ) - [Overlapping Intervals Pattern](https://blog.algomaster.io/p/812e72f7-eced-4256-a4c1-00606ae50679) - [Backtracking Pattern](https://blog.algomaster.io/p/81d42ca2-600c-4252-aa33-a56462090048) - [Modified Binary Search Pattern](https://blog.algomaster.io/p/d0d81b04-4c2a-4b45-a101-5137c3146686) - [Tree Patterns](https://leetcode.com/discuss/study-guide/937307/Iterative-or-Recursive-or-DFS-and-BFS-Tree-Traversal-or-In-Pre-Post-and-LevelOrder-or-Views) - [Tree Iterative Traversal](https://medium.com/leetcode-patterns/leetcode-pattern-0-iterative-traversals-on-trees-d373568eb0ec) - [Tree Question Pattern](https://leetcode.com/discuss/study-guide/2879240/TREE-QUESTION-PATTERN-2023-oror-TREE-STUDY-GUIDE) - [Graph Patterns](https://leetcode.com/discuss/study-guide/655708/Graph-For-Beginners-Problems-or-Pattern-or-Sample-Solutions) - [DFS + BFS Patterns (1)](https://medium.com/leetcode-patterns/leetcode-pattern-1-bfs-dfs-25-of-the-problems-part-1-519450a84353) - [DFS + BFS Patterns (2)](https://medium.com/leetcode-patterns/leetcode-pattern-2-dfs-bfs-25-of-the-problems-part-2-a5b269597f52) ## 📝 Must-Read Leetcode Articles - [Sliding Window Template](https://leetcode.com/problems/frequency-of-the-most-frequent-element/solutions/1175088/C++-Maximum-Sliding-Window-Cheatsheet-Template/) - [Two Pointers Patterns](https://leetcode.com/discuss/study-guide/1688903/Solved-all-two-pointers-problems-in-100-days) - [Collections of Important String Questions](https://leetcode.com/discuss/study-guide/2001789/Collections-of-Important-String-questions-Pattern) - [Substring Problem Template](https://leetcode.com/problems/minimum-window-substring/solutions/26808/Here-is-a-10-line-template-that-can-solve-most-'substring'-problems/) - [Binary Search Template](https://leetcode.com/discuss/study-guide/786126/Python-Powerful-Ultimate-Binary-Search-Template.-Solved-many-problems) - [A General Approach to Backtracking Questions](https://leetcode.com/problems/permutations/solutions/18239/A-general-approach-to-backtracking-questions-in-Java-(Subsets-Permutations-Combination-Sum-Palindrome-Partioning)/) - [Monotonic Stack Template](https://leetcode.com/discuss/study-guide/2347639/A-comprehensive-guide-and-template-for-monotonic-stack-based-problems) - [Heap Patterns](https://leetcode.com/discuss/general-discussion/1127238/master-heap-by-solving-23-questions-in-4-patterns-category) - [Bit Manipulation Patterns](https://leetcode.com/discuss/study-guide/4282051/all-types-of-patterns-for-bits-manipulations-and-how-to-use-it) - [Dynamic Programming Patterns](https://leetcode.com/discuss/study-guide/458695/Dynamic-Programming-Patterns) - [Stock Series Patterns](https://leetcode.com/problems/best-time-to-buy-and-sell-stock-with-transaction-fee/solutions/108870/most-consistent-ways-of-dealing-with-the-series-of-stock-problems/) ## ✅ Curated Problems - [AlgoMaster 300](https://algomaster.io/practice/dsa-patterns) - [Blind 75](https://leetcode.com/discuss/general-discussion/460599/blind-75-leetcode-questions) - [Leetcode Top 100 Liked](https://leetcode.com/studyplan/top-100-liked/) - [Leetcode Top Interview 150](https://leetcode.com/studyplan/top-interview-150/) ## 📺 YouTube Playlist - [AlgoMaster LeetCode Pattern Playlist](https://www.youtube.com/playlist?list=PLK63NuByH5o-tqaMUHRA4r8ObRW7PWz45) - [Abdul Bari's Algorithms Playlist](https://www.youtube.com/playlist?list=PLDN4rrl48XKpZkf03iYFl-O29szjTrs_O) - [William Fiset's Data Structure Playlist](https://www.youtube.com/playlist?list=PLDV1Zeh2NRsB6SWUrDFW2RmDotAfPbeHu) - [William Fiset's Graphs Playlist](https://www.youtube.com/playlist?list=PLDV1Zeh2NRsDGO4--qE8yH72HFL1Km93P) - [Tushar Roy's Dynamic Programming Playlist](https://www.youtube.com/playlist?list=PLrmLmBdmIlpsHaNTPP_jHHDx_os9ItYXr) ## 📇 Courses - [Coursera - Algorithms, Part I](https://www.coursera.org/learn/algorithms-part1) - [Coursera - Algorithms, Part 2](https://www.coursera.org/learn/algorithms-part2) ## 📚 Books - [Data Structures And Algorithms Made Easy](https://www.amazon.in/dp/B08CMLS7LZ) - [Cracking the Coding Interview](https://www.amazon.in/dp/0984782850) ## 📩 Newsletter - [AlgoMaster Newsletter](https://blog.algomaster.io/) ## 🔎 Visualization - [VisuAlgo](https://visualgo.net/en) - [Algo-lens: Visualize leetcode problems](https://github.com/jaroslaw-weber/algo-lens) ## 📎 LeetCode Extensions - [LeetCode Timer](https://chromewebstore.google.com/detail/leetcode-timer/gfkgelnlcnomnahkfmhemgpahgmibofd): Easily time your leetcode practise sessions with automatic time setting based on difficulty. - [LeetCode Video Solutions](https://chromewebstore.google.com/detail/leetcode-video-solutions/ilnmgkahgjdpkoliooildngldmilhelm): Watch free LeetCode video ▶ solutions on the problem page itself. - [LeetCode Format](https://chromewebstore.google.com/detail/leetcode-format/imogghebhifnnlgogigikjecilkicfpp): Adds Format code button on leetcode to format the code using Prettier code formatter. - [LeetHub v2](https://chromewebstore.google.com/detail/leethub-v2/mhanfgfagplhgemhjfeolkkdidbakocm?hl=en): Automatically integrate your Leetcode & GeeksforGeeks submissions to GitHub. - [LeetCode VS Code Extension](https://marketplace.visualstudio.com/items?itemName=LeetCode.vscode-leetcode): Solve LeetCode problems in VS Code. Your contributions are most welcome! --- <p align="center"> <i>If you find this resource helpful, please give it a star ⭐️ and share it with others!</i> </p> ", Assign "at most 3 tags" to the expected json: {"id":"4205","tags":[]} "only from the tags list I provide: [{"id":77,"name":"3d"},{"id":89,"name":"agent"},{"id":17,"name":"ai"},{"id":54,"name":"algorithm"},{"id":24,"name":"api"},{"id":44,"name":"authentication"},{"id":3,"name":"aws"},{"id":27,"name":"backend"},{"id":60,"name":"benchmark"},{"id":72,"name":"best-practices"},{"id":39,"name":"bitcoin"},{"id":37,"name":"blockchain"},{"id":1,"name":"blog"},{"id":45,"name":"bundler"},{"id":58,"name":"cache"},{"id":21,"name":"chat"},{"id":49,"name":"cicd"},{"id":4,"name":"cli"},{"id":64,"name":"cloud-native"},{"id":48,"name":"cms"},{"id":61,"name":"compiler"},{"id":68,"name":"containerization"},{"id":92,"name":"crm"},{"id":34,"name":"data"},{"id":47,"name":"database"},{"id":8,"name":"declarative-gui "},{"id":9,"name":"deploy-tool"},{"id":53,"name":"desktop-app"},{"id":6,"name":"dev-exp-lib"},{"id":59,"name":"dev-tool"},{"id":13,"name":"ecommerce"},{"id":26,"name":"editor"},{"id":66,"name":"emulator"},{"id":62,"name":"filesystem"},{"id":80,"name":"finance"},{"id":15,"name":"firmware"},{"id":73,"name":"for-fun"},{"id":2,"name":"framework"},{"id":11,"name":"frontend"},{"id":22,"name":"game"},{"id":81,"name":"game-engine "},{"id":23,"name":"graphql"},{"id":84,"name":"gui"},{"id":91,"name":"http"},{"id":5,"name":"http-client"},{"id":51,"name":"iac"},{"id":30,"name":"ide"},{"id":78,"name":"iot"},{"id":40,"name":"json"},{"id":83,"name":"julian"},{"id":38,"name":"k8s"},{"id":31,"name":"language"},{"id":10,"name":"learning-resource"},{"id":33,"name":"lib"},{"id":41,"name":"linter"},{"id":28,"name":"lms"},{"id":16,"name":"logging"},{"id":76,"name":"low-code"},{"id":90,"name":"message-queue"},{"id":42,"name":"mobile-app"},{"id":18,"name":"monitoring"},{"id":36,"name":"networking"},{"id":7,"name":"node-version"},{"id":55,"name":"nosql"},{"id":57,"name":"observability"},{"id":46,"name":"orm"},{"id":52,"name":"os"},{"id":14,"name":"parser"},{"id":74,"name":"react"},{"id":82,"name":"real-time"},{"id":56,"name":"robot"},{"id":65,"name":"runtime"},{"id":32,"name":"sdk"},{"id":71,"name":"search"},{"id":63,"name":"secrets"},{"id":25,"name":"security"},{"id":85,"name":"server"},{"id":86,"name":"serverless"},{"id":70,"name":"storage"},{"id":75,"name":"system-design"},{"id":79,"name":"terminal"},{"id":29,"name":"testing"},{"id":12,"name":"ui"},{"id":50,"name":"ux"},{"id":88,"name":"video"},{"id":20,"name":"web-app"},{"id":35,"name":"web-server"},{"id":43,"name":"webassembly"},{"id":69,"name":"workflow"},{"id":87,"name":"yaml"}]" returns me the "expected json"