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DSA Resource and prep Strategy Resources :- DSA for beginners takeuforward.org/dsa/strivers-a… @takeUforward/playlists" target="_blank" rel="nofollow noopener">youtube.com/@takeUforward/… Also you can follow any curated list like Neetcode 150, Striver SDE sheets etc. takeuforward.org/dsa/strivers-s… takeuforward.org/dsa/blind-75-l… Commonly asked Patterns List DSA topics are generally common But here is a curated patterns list Note :- This is an exhaustive list use chatGPT to curate this list according to the company and SDE level you are preparing for. Ask it to pull references from leetcode discuss and curate. 1. Arrays & Hashing Fundamentals Core Patterns * Two Sum Pattern * Majority Element * Kadane's Algorithm * Array Rearrangement * Matrix Manipulation * Interval Merging * Prefix Sum + Hashing * Greedy Array Traversal 2. Sliding Window & Two Pointers Fixed Window * Fixed Size Window * Window Maximum Variable Window * Longest Substring Pattern * Character Frequency Windows * Distinct Elements Window * Minimum Window Pattern Two Pointers * Opposite Direction Pointers * Fast & Slow Pointers * Partitioning Techniques 3. Strings String Fundamentals * Character Counting * String Matching * String Parsing Advanced Patterns * Palindrome Problems * Anagram Problems * Grouping & Hashing * Pattern Matching String Algorithms * KMP * Z Algorithm * Rabin Karp 4. Binary Search Basic Binary Search * Search in Sorted Array * Boundary Search Modified Binary Search * Rotated Arrays * Duplicates Handling * Peak Problems Binary Search on Answer * Capacity Optimization * Allocation Problems * Min-Max Optimization 2D Binary Search * Matrix Search * Matrix Median 5. Recursion & Backtracking Recursion Fundamentals * Pick / Not Pick Pattern * Recursive Tree Visualization Backtracking * Subsets * Permutations * Combination Generation * Constraint Satisfaction Grid Backtracking * Word Search * Path Exploration 6. Linked Lists Fundamentals * Traversal * Reversal * Fast & Slow Pointer Intermediate * Cycle Detection * Merge Lists * Intersection Problems Advanced * LRU Cache Design * Random Pointer Lists 7. Stacks & Queues Stack Basics * Monotonic Stack * Parentheses Problems Queue Basics * BFS Queue Usage * Circular Queue Concepts Monotonic Structures * Next Greater Element * Next Smaller Element * Histogram Problems Design Problems * Min Stack * Queue Using Stacks * Stack Using Queues 8. Heaps & Priority Queues Heap Fundamentals * Min Heap * Max Heap Top-K Problems * K Largest / Smallest * Top K Frequent Stream Processing * Running Median * Online Processing Scheduling Problems * Task Scheduling * Resource Allocation Multi-Way Merge * Merge K Sorted Structures 9. Trees Tree Traversals * DFS Traversals * BFS Traversals View Problems * Left View * Right View * Top View * Bottom View * Boundary Traversal * Vertical Traversal Structural Problems * Height * Diameter * Balanced Tree * Symmetry Path Problems * Maximum Path Sum * Root to Leaf Problems * Distance K Tree Construction * Traversal Based Construction * Serialization & Deserialization Ancestor Problems * Lowest Common Ancestor 10. Binary Search Trees BST Fundamentals * Search * Insert * Delete BST Properties * Validation * Kth Smallest / Largest Advanced BST * BST Iterator * Recover BST * Largest BST in Binary Tree 11. Graphs Graph Traversal * BFS * DFS Connected Components * Number of Islands * Provinces * Flood Fill Cycle Detection * Undirected Cycle Detection * Directed Cycle Detection Topological Sorting * DFS Topological Sort * Kahn's Algorithm * DAG Processing * Course Schedule Bipartite Graphs * Graph Coloring * Bipartition Validation Grid BFS * Multi-source BFS * Shortest Path in Grid Shortest Paths * Dijkstra * BFS Shortest Path * Weighted Graph Problems Disjoint Set Union (DSU) * Union Find * Path Compression * Union by Rank / Size Applications * Accounts Merge * Dynamic Connectivity 12. Greedy Algorithms Interval Greedy * Activity Selection * Meeting Scheduling * Interval Insertion * Interval Removal Reachability * Jump Game * Resource Allocation Scheduling * Job Sequencing * Task Ordering Distribution * Candy Distribution * Load Distribution 13. Dynamic Programming DP Fundamentals * Memoization * Tabulation * Space Optimization 1D DP * House Robber * Coin Change * Decode Ways 2D DP * Grid DP * Unique Paths Subsequence DP * LIS * LCS * Knapsack Variants Partition DP * Equal Subset Partition * State Splitting Problems Pattern Recognition * Take / Not Take * Buy / Sell * Partition * String DP 15. Design-Oriented Coding Patterns (Very Important for SDE-2) Data Structure Design * LRU Cache * Min Stack * BST Iterator * Median Finder Systematic Problem Solving * Custom Comparator Usage * Priority Queue Design * Iterator Design * Stream Processing

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