🔥 *Complete DSA Cheatsheet!* ✅📚 🔵 *Intro to DSA:* ✔️ Algorithms ✔️ Data Structures ✔️ Time & Space Complexity ✔️ Big O Notation 🧮 *Mathematics for DSA:* ✔️ GCD / LCM ✔️ Prime Numbers ✔️ Sieve of Eratosthenes ✔️ Modulo Operations ✔️ Bit Manipulation 📐 *Arrays & Strings:* ✔️ 1D/2D Arrays, Prefix Sum ✔️ Sliding Window Technique ✔️ Kadane’s Algorithm (Max Subarray) ✔️ Sorting: Bubble, Merge, Quick ✔️ Palindromes, Anagrams ✔️ KMP, Z Algorithm, Manacher’s 🔗 *Linked Lists:* ✔️ Singly & Doubly Linked List ✔️ Circular Lists ✔️ Reverse a Linked List ✔️ Cycle Detection (Floyd’s Algo) ✔️ Merge Point of Two Lists 📦 *Stacks & Queues:* ✔️ Stack (Infix to Postfix) ✔️ Min Stack ✔️ Queue & Deque ✔️ Priority Queue (Heap) 🔁 *Recursion & Backtracking:* ✔️ Fibonacci ✔️ N-Queens ✔️ Subsets, Permutations ✔️ Sudoku Solver 🔍 *Searching & Hashing:* ✔️ Linear & Binary Search ✔️ Rotated Array Search ✔️ HashMap / HashSet ✔️ Frequency Count ✔️ Collision Handling 🌲 *Trees & Graphs:* ✔️ Binary Tree, BST, AVL ✔️ Tree Traversals (Inorder, Preorder, Postorder) ✔️ Diameter, LCA ✔️ BFS / DFS / Topo Sort ✔️ Cycle Detection ✔️ Dijkstra, Kruskal, DSU 📊 *Dynamic Programming:* ✔️ 0/1 Knapsack ✔️ LCS, LIS ✔️ Matrix Chain ✔️ Tabulation & Memoization ⚡ *Greedy Algorithms:* ✔️ Activity Selection ✔️ Job Scheduling ✔️ Huffman Coding ✔️ Coin Change 🧠 *Tries & Templates:* ✔️ Tries: Insert, Search, Prefix Match ✔️ Coding Templates: Recursion, Binary Search, DP Table, Backtracking Skeleton 🛠️ *Mini Projects to Practice:* ✔️ DSA Visualizer ✔️ Algorithm Simulator ✔️ Custom String Matcher ⚠️ *Common Mistakes Beginners Make:* 🚫 Using = instead of == 🚫 Forgetting Semicolons 🚫 Infinite Loops 🚫 Wrong Indexing (Arrays start at 0) 🚫 Ignoring Edge Cases (Empty input, duplicates, large values) *React with ❤️ for detailed explanation of each topic*