90-Day Thorough

Alternating Groups I

Alternating Groups II

Apply Operations to Maximize Frequency Score

Arithmetic Slices

Best Time to Buy and Sell Stock using Strategy

Binary String With Substrings Representing 1 To N

Binary Subarrays With Sum

Continuous Subarrays

Git Basics & Workflow

Learn commit, push, pull, branch, and merge strategies.

Count Complete Subarrays in an Array

Count Number of Nice Subarrays

Alternating Groups I

Alternating Groups II

Quantitative: Percentages & Ratios

Core math foundations often tested in screening rounds.

Apply Operations to Maximize Frequency Score

Arithmetic Slices

Best Time to Buy and Sell Stock using Strategy

Binary String With Substrings Representing 1 To N

JavaScript ES6+ Essentials

Arrow functions, destructuring, promises, and async/await.

Binary Subarrays With Sum

Continuous Subarrays

Count Complete Subarrays in an Array

Count Number of Nice Subarrays

Apply Operations to an Array

3Sum Closest

Checking Existence of Edge Length Limited Paths

3Sum Smaller

REST APIs & Fetch

Understand HTTP methods, status codes, and fetching data.

Quantitative: Time & Work

Classic problems involving rates and combined efforts.

3Sum With Multiplicity

3Sum

4Sum

Add Two Polynomials Represented as Linked Lists

Adding Spaces to a String

Advantage Shuffle

Apply Operations to an Array

3Sum Closest

SQL Fundamentals

SELECT, JOIN, GROUP BY, and basic indexing concepts.

Checking Existence of Edge Length Limited Paths

3Sum Smaller

3Sum With Multiplicity

3Sum

Logical Reasoning: Syllogisms

Deductive reasoning and statement validity.

4Sum

Add Two Polynomials Represented as Linked Lists

Adding Spaces to a String

Advantage Shuffle

React/Next.js Foundations

Components, state, props, and simple routing.

Ant on the Boundary

Apply Operations to Make All Array Elements Equal to Zero

Apply Operations to Maximize Frequency Score

Average Height of Buildings in Each Segment

Best Time to Buy and Sell Stock using Strategy

Binary Subarrays With Sum

Bitwise OR of All Subsequence Sums

Brightest Position on Street

Mini-Project: Todo App

Build a persistent CRUD app to solidify your skills.

Logical Reasoning: Data Interpretation

Extracting insights from charts and tables.

Can Make Palindrome from Substring

Can You Eat Your Favorite Candy on Your Favorite Day?

Arranging Coins

132 Pattern

Apply Operations to Maximize Frequency Score

3Sum Smaller

Adjacent Increasing Subarrays Detection II

All Elements in Two Binary Search Trees

Avoid Flood in The City

Balance a Binary Search Tree

Binary Search Tree Iterator II

Binary Search Tree Iterator

Verbal: Reading Comprehension

Speed reading and answering derived questions.

Arranging Coins

132 Pattern

Apply Operations to Maximize Frequency Score

3Sum Smaller

Adjacent Increasing Subarrays Detection II

All Elements in Two Binary Search Trees

Avoid Flood in The City

Balance a Binary Search Tree

Beautiful Towers I

Beautiful Towers II

Load Balancing

Distributing traffic to prevent single points of failure.

Apple Redistribution into Boxes

3Sum Closest

Alien Dictionary

3Sum Smaller

3Sum With Multiplicity

3Sum

4Sum

Accounts Merge

Advantage Shuffle

Alert Using Same Key-Card Three or More Times in a One Hour Period

Caching Strategies

Read-through, write-through, and caching layers.

Convert Binary Number in a Linked List to Integer

Add Two Numbers II

All O`one Data Structure

Add Two Numbers

Add Two Polynomials Represented as Linked Lists

Convert Binary Search Tree to Sorted Doubly Linked List

Convert Sorted List to Binary Search Tree

Copy List with Random Pointer

Delete Node in a Linked List

Delete Nodes From Linked List Present in Array

Database Sharding & Replication

Scaling databases horizontally vs vertically.

Average of Levels in Binary Tree

Add One Row to Tree

Amount of New Area Painted Each Day

All Elements in Two Binary Search Trees

All Nodes Distance K in Binary Tree

All Possible Full Binary Trees

Amount of Time for Binary Tree to Be Infected

Balance a Binary Search Tree

Binary Search Tree Iterator II

Binary Search Tree Iterator

CAP Theorem

Understanding trade-offs in distributed systems.

Average of Levels in Binary Tree

Add One Row to Tree

Amount of New Area Painted Each Day

All Elements in Two Binary Search Trees

All Nodes Distance K in Binary Tree

All Possible Full Binary Trees

Amount of Time for Binary Tree to Be Infected

Balance a Binary Search Tree

Binary Search Tree Iterator II

Binary Search Tree Iterator

Message Queues

Asynchronous processing with Kafka/RabbitMQ.

Find Center of Star Graph

All Ancestors of a Node in a Directed Acyclic Graph

Add Edges to Make Degrees of All Nodes Even

All Paths from Source Lead to Destination

All Paths From Source to Target

Apply Substitutions

Cheapest Flights Within K Stops

Clone Graph

Connecting Cities With Minimum Cost

Count the Number of Complete Components

Find Center of Star Graph

All Ancestors of a Node in a Directed Acyclic Graph

Add Edges to Make Degrees of All Nodes Even

All Paths from Source Lead to Destination

All Paths From Source to Target

Apply Substitutions

Cheapest Flights Within K Stops

Clone Graph

Connecting Cities With Minimum Cost

Count the Number of Complete Components

Find Center of Star Graph

All Ancestors of a Node in a Directed Acyclic Graph

Add Edges to Make Degrees of All Nodes Even

All Paths from Source Lead to Destination

All Paths From Source to Target

Apply Substitutions

Cheapest Flights Within K Stops

Clone Graph

Connecting Cities With Minimum Cost

Count the Number of Complete Components

Find Center of Star Graph

Accounts Merge

Add Edges to Make Degrees of All Nodes Even

All Ancestors of a Node in a Directed Acyclic Graph

All Paths from Source Lead to Destination

All Paths From Source to Target

Apply Substitutions

Cheapest Flights Within K Stops

Check if There is a Valid Path in a Grid

Clone Graph

Find Center of Star Graph

All Ancestors of a Node in a Directed Acyclic Graph

Resume Review

Ensure your resume is ATS-friendly and highlights impact (metrics).

Add Edges to Make Degrees of All Nodes Even

All Paths from Source Lead to Destination

All Paths From Source to Target

Apply Substitutions

The STAR Method

Situation, Task, Action, Result. The framework for behavioral answers.

Cheapest Flights Within K Stops

Clone Graph

Connecting Cities With Minimum Cost

Count the Number of Complete Components

LinkedIn Optimization

Update your headline, summary, and open-to-work settings.

Delete Greatest Value in Each Row

Average Height of Buildings in Each Segment

Tell Me About Yourself

Crafting a compelling 2-minute elevator pitch.

Car Fleet II

Avoid Flood in The City

Campus Bikes

Car Pooling

Cheapest Flights Within K Stops

Choose K Elements With Maximum Sum

Handling Conflict

Prepare a story about disagreeing with a coworker or manager.

Mock Interview Practice

Do a recorded mock interview to check your body language and pacing.

Connecting Cities With Minimum Cost

Construct String With Repeat Limit

Binary Tree Paths

Add Two Numbers

24 Game

Additive Number

Your Biggest Weakness

How to frame a real weakness and your steps to improve it.

All Paths From Source to Target

All Possible Full Binary Trees

Cold Emailing & Networking

Drafting a concise message for referrals.

Ambiguous Coordinates

Android Unlock Patterns

Balanced K-Factor Decomposition

Beautiful Arrangement

Questions for the Interviewer

Prepare 3 insightful questions to ask at the end of the interview.