Master Data Structures & Algorithms

Start your DSA journey with well-organized resources, problem sets, and visual guides to crack placements and coding interviews.

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Tools & Cheat Sheets

Download handy references and study materials

Big-O Cheat Sheet

Complete reference for time and space complexity of all algorithms

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Sorting Algorithms

Visual guide to all sorting algorithms with implementations

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Graph Algorithms

Cheat sheet for graph traversal and shortest path algorithms

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DP Patterns

Common dynamic programming patterns with examples

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DSA Roadmap

Visual learning path for mastering DSA

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Interview Guide

Top 100 DSA interview questions with solutions

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DSA Quizzes

Test your knowledge with interactive quizzes

1. What is the time complexity of binary search on a sorted array of size n?

2. Which data structure uses LIFO (Last In First Out) principle?

3. In dynamic programming, what technique stores results of subproblems to avoid recomputation?

Weekly DSA Challenge

Two Sum
Valid Parentheses
Merge Intervals
Longest Substring Without Repeating Characters
Product of Array Except Self
House Robber

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Community Discussions

AJ

How to optimize space in DP problems?

I'm working on the 0/1 Knapsack problem and trying to reduce the space complexity from O(nW) to O(W). Any suggestions on how to approach this optimization?

5 Replies Like
SW

Best resources for graph algorithms?

I'm preparing for interviews and want to strengthen my graph algorithm skills. What are the best resources (books, videos, problems) you recommend for mastering graph algorithms?

12 Replies Like
MB

Time complexity of recursive algorithms

I'm having trouble calculating time complexity for recursive algorithms like Tower of Hanoi. Can someone explain how to approach these calculations systematically?

8 Replies Like