Early Development: This DSA visualizer module is actively being built. Some step generation logic or algorithm answers may still be experimental or incorrect.

DSA Masterclass Roadmap

Follow this comprehensive 60+ problem interactive curriculum to master Arrays, Strings, Matrices, Hashing, and advanced Algorithms.

1

Basics

10 / 10

Concatenation of Array

Easy

Running Sum of 1D Array

Easy

Richest Customer Wealth

Easy

Shuffle the Array

Easy

Find Numbers with Even Number of Digits

Easy

How Many Numbers Are Smaller Than the Current Number

Easy

Find Closest Number to Zero

Easy

Find Pivot Index

Easy

Remove Element

Easy

Remove Duplicates from Sorted Array

Easy
2

Linear Search

5 / 5

Binary Search

Easy

Search Insert Position

Easy

Find First and Last Position of Element

Medium

First Bad Version

Easy

Guess Number Higher or Lower

Easy
3

Two Pointers

8 / 8

Merge Sorted Array

Easy

Squares of a Sorted Array

Easy

Two Sum II

Medium

Container With Most Water

Medium

3Sum

Medium

4Sum

Medium

Trapping Rain Water

Hard

Sort Colors

Medium
4

Sliding Window

7 / 7

Maximum Average Subarray I

Easy

Best Time to Buy and Sell Stock

Easy

Minimum Size Subarray Sum

Medium

Max Consecutive Ones III

Medium

Fruit Into Baskets

Medium

Maximum Number of Vowels in a Substring

Medium

Sliding Window Maximum

Hard
5

Prefix Sum

5 / 5

Range Sum Query - Immutable

Easy

Find Pivot Index

Easy

Subarray Sum Equals K

Medium

Continuous Subarray Sum

Medium

Subarray Sums Divisible by K

Medium
6

Hashing

8 / 8

Two Sum

Easy

Contains Duplicate

Easy

Contains Duplicate II

Easy

Majority Element

Easy

Longest Consecutive Sequence

Medium

Intersection of Two Arrays

Easy

Intersection of Two Arrays II

Easy

Ransom Note

Easy
7

Kadane's Algorithm

3 / 3

Maximum Subarray

Medium

Maximum Product Subarray

Medium

Maximum Sum Circular Subarray

Medium
8

Matrix

7 / 7

Reshape the Matrix

Easy

Transpose Matrix

Easy

Matrix Diagonal Sum

Easy

Set Matrix Zeroes

Medium

Rotate Image

Medium

Spiral Matrix

Medium

Search a 2D Matrix

Medium
9

Advanced Arrays

8 / 8

Product of Array Except Self

Medium

Missing Number

Easy

Find All Numbers Disappeared in an Array

Easy

Find the Duplicate Number

Medium

First Missing Positive

Hard

Single Number

Easy

Single Number II

Medium

Find All Duplicates in an Array

Medium
10

Hard Problems

5 / 5

Median of Two Sorted Arrays

Hard

Trapping Rain Water

Hard

Largest Rectangle in Histogram

Hard

Sliding Window Maximum

Hard

Count of Smaller Numbers After Self

Hard