Data Structures & Algorithms

Core data structures, algorithms, and interview patterns

55 chapters across 11 modules

1

Complexity Analysis

6 chapters

1

Why DSA Matters & How to Approach These Notes

5 min read

2

Big O Notation

5 min read

3

Time Complexity Analysis

4 min read

4

Space Complexity Analysis

4 min read

5

Best, Average & Worst Case

4 min read

6

Practice: Analyzing Complexity of Code Snippets

5 min read

2

Arrays And Strings

7 chapters

1

Array Fundamentals & Traversal

4 min read

2

Searching, Insertion & Deletion

4 min read

3

Two-Pointer Technique

4 min read

4

Sliding Window Technique

5 min read

5

String Operations & Immutability

4 min read

6

Pattern-Based String Problems

4 min read

7

Practice: Classic Array & String Problems

5 min read

3

Searching And Sorting

6 chapters

1

Linear Search & Binary Search

5 min read

2

Bubble Sort & Selection Sort

5 min read

3

Insertion Sort

4 min read

4

Merge Sort

4 min read

5

Quick Sort

5 min read

6

Choosing the Right Algorithm

5 min read

4

Recursion And Backtracking

5 chapters

1

Understanding Recursion & the Call Stack

5 min read

2

Recursive Thinking & Recursion Trees

5 min read

3

Classic Recursion Problems

4 min read

4

Backtracking Fundamentals

5 min read

5

Classic Backtracking Problems

5 min read

5

Stacks And Queues

5 chapters

1

Stack Concept & Implementation

4 min read

2

Stack Applications

4 min read

3

Queue & Circular Queue

5 min read

4

Deque

4 min read

5

Practice Problems

5 min read

6

Linked Lists

4 chapters

1

Singly Linked List

5 min read

2

Doubly Linked List

4 min read

3

Common Linked List Patterns

5 min read

4

Practice Problems

6 min read

7

Trees And Heaps

5 chapters

1

Binary Tree Fundamentals

5 min read

2

Tree Traversals

5 min read

3

Binary Search Trees

5 min read

4

Heaps & Priority Queues

6 min read

5

Practice Problems

6 min read

8

Hashing

4 chapters

1

Hash Maps & Dictionaries

5 min read

2

Sets

4 min read

3

Frequency Counting Pattern

4 min read

4

Common Hashing Problems

6 min read

9

Graphs

4 chapters

1

Graph Representation

5 min read

2

Breadth-First Search

5 min read

3

Depth-First Search

5 min read

4

Common Graph Problems

6 min read

10

Dynamic Programming And Greedy

5 chapters

1

Memoization vs. Tabulation

7 min read

2

Classic 1D DP

5 min read

3

Classic 2D DP

6 min read

4

Greedy Algorithms & When They Work

7 min read

5

Classic Greedy Problems

6 min read

11

Interview Prep And Revision

4 chapters

1

Pattern Recognition Cheat Sheet

5 min read

2

Mixed Practice Problems

6 min read

3

Mock Interview-Style Questions

7 min read

4

Final Revision & Next Steps

5 min read