🚀 Awesome Data Structures & Algorithms

A roadmap for data structures and algorithms with comprehensive tutorials & practice resources.

✅ Data Structures

🎯 Time & Space Complexity

• 📚 Tutorials

  • Introduction to Big O Notation and Time Complexity - by CS Dojo
  • Big-O Notation For Coding Interviews - by NeetCode
  • Time and Space Complexity - by take U forward

🎯 Arrays

• 📚 Tutorials

  • An Overview of Arrays and Memory - by CS Dojo
  • Arrays Intro - by take U forward

• ⚡ Practice Problems

  • Two Sum - Solution
  • Concatenation of Array - Solution
  • Replace Elements with Greatest Element on Right Side - Solution
  • Is Subsequence - Solution
  • Length of Last Word - Solution
  • Longest Common Prefix - Solution
  • Pascal's Triangle - Solution
  • Find All Numbers Disappeared in an Array - Solution
  • Number of Good Pairs - Solution

🎯 Linked Lists

• 📚 Tutorials

  • Introduction to Linked Lists - by CS Dojo
  • Linked List Playlist - by take U forward

• ⚡ Practice Problems

  • Design Linked List - Solution
  • Reverse Linked List - Solution
  • Merge Two Sorted Lists - Solution
  • Linked List Cycle - Solution
  • Palindrome Linked List - Solution
  • Remove Linked List Elements - Solution
  • Remove Duplicates from Sorted List - Solution
  • Middle of the Linked List - Solution
  • Intersection of Two Linked Lists - Solution

🎯 Stacks & Queues

• 📚 Tutorials

  • Introduction to Stacks and Queues - by CS Dojo
  • Stack and Queue Playlist - by take U forward

• ⚡ Practice Problems

  • Baseball Game - Solution
  • Valid Parentheses - Solution
  • Implement Stack using Queues - Solution
  • Implement Queue using Stacks - Solution
  • Make The String Great - Solution
  • Min Stack - Solution
  • Evaluate Reverse Polish Notation - Solution
  • Removing Stars From a String - Solution
  • Design Circular Queue - Solution

🎯 Hash Tables

• 📚 Tutorials

  • Introduction to Hash Tables and Dictionaries - by CS Dojo
  • Hash Tables: Hash Functions, Sets, & Maps - by Greg Hogg
  • Hash Map Tutorial - by take U forward

• ⚡ Practice Problems

  • Design HashMap - Solution
  • Design HashSet - Solution
  • will add more problems soon ...

🎯 Graphs

• 📚 Tutorials

  • Graph Series Playlist - by take U forward
  • Graph Theory Tutorial from a Google Engineer
  • Graph Algorithms for Technical Interviews

• ⚡ Practice Problems

  • will add more problems soon ...

🎯 Trees

• 📚 Tutorials

  • Trees Playlist - by take U forward
  • Introduction to Trees - by CS Dojo
  • Binary Tree Algorithms for Technical Interviews

• ⚡ Practice Problems

  • will add more problems soon ...

🎯 Trie

• 📚 Tutorials

  • Tries - by Gayle Laakmann
  • Trie Series Playlist - by take U forward
  • TRIE in Coding Interviews - by Errichto

• ⚡ Practice Problems

  • Implement Trie - Solution
  • will add more problems soon ...

🎯 Heap

• 📚 Tutorials

  • Heap Tutorial - by Abdul Bari
  • HEAP Playlist - by Techdose

• ⚡ Practice Problems

  • Kth Largest Element in a Stream - Solution
  • will add more problems soon ...

🎯 Segment Tree

• 📚 Tutorials

  • Segment Tree Tutorial - by take U forward
  • Lazy Propagation in Segment Tree - by take U forward
  • Segment Tree (Implementation) - by Errichto

• ⚡ Practice Problems

  • Range Sum Query - Mutable - Solution
  • will add more problems soon ...

✅ Algorithms

🎯 Algorithmic Paradigms

• Brute Force
• Greedy Algorithms
• Divide and Conquer
• Dynamic Programming

🎯 Sorting Algorithms

• 📚 Tutorials:

  • Bubble Sort
  • Selection Sort
  • Insertion Sort
  • Merge Sort
  • Quick Sort
  • Heap Sort
  • Counting Sort
  • Radix Sort
  • Bucket Sort

• ⚡ Practice Problems:

  • will add more problems soon ...

🎯 Searching Algorithms

• 📚 Tutorials:

  • Linear Search
  • Binary Search
    • Binary Search tutorial - by Errichto
    • Binary Search Playlist by take U forward

• ⚡ Practice Problems:

  • will add more problems soon ...

🎯 Recursion & Backtracking

• 📚 Tutorials:

  • Introduction to Recursion - by CS Dojo
  • Introduction to Backtracking - by Abdul Bari
  • Recursive Backtracking - by Greg Hogg
  • Recursion & Backtracking Playlist - by take U forward

• ⚡ Practice Problems:

  • will add more problems soon ...

🎯 Divide and Conquer

• 📚 Tutorials:

  • Merge Sort
  • Quick Sort
  • Binary Search
  • Exponentiation (Fast Power)

• ⚡ Practice Problems:

  • will add more problems soon ...

🎯 Dynamic Programming (DP)

• 📚 Tutorials:

  • What Is Dynamic Programming - by CS Dojo
  • Dynamic Programming Playlist - by take U forward

• ⚡ Practice Problems:

  • will add more problems soon ...

🎯 Graph Algorithms

• 📚 Tutorials:

  • BFS & DFS
  • BFS (Breadth-First Search)
  • DFS (Depth-First Search)
  • Dijkstra’s Algorithm
  • Bellman-Ford Algorithm
  • Floyd-Warshall Algorithm
  • Topological Sorting (Kahn’s Algorithm, DFS)
  • Strongly Connected Components (Kosaraju, Tarjan)
  • Kruskal’s Algorithm (MST)
  • Prim’s Algorithm (MST)

• ⚡ Practice Problems:

  • will add more problems soon ...

🎯 Tree Algorithms

• 📚 Tutorials:

  • Binary Tree Traversals (Inorder, Preorder, Postorder)
  • Lowest Common Ancestor (LCA)
  • Diameter of a Tree
  • Tree Serialization & Deserialization
  • Binary Search Tree (BST) Operations (Insert, Delete, Search)
  • AVL Tree (Self-balancing BST)
  • Trie (Prefix Tree) – Insert, Search, Delete

• ⚡ Practice Problems:

  • will add more problems soon ...

🎯 Bit Manipulation

• 📚 Tutorials:

  • Binary Numbers and Bit Manipulation - by Greg Hogg
  • Bitwise Operations tutorial - by Errichto
  • Bit Manipulation Playlist - by take U forward

• ⚡ Practice Problems:

  • will add more problems soon ...

🎯 String Algorithms

• 📚 Tutorials:

  • KMP Algorithm (Pattern Matching)
  • Rabin-Karp Algorithm (String Hashing)
  • Z-Algorithm (Substring Search)
  • Longest Palindromic Substring (Manacher’s Algorithm)
  • Suffix Array & LCP Array

• ⚡ Practice Problems:

  • will add more problems soon ...