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Learn Through Visuals

Visual guides for complex technical topics — DSA, system design, security, cloud, AI, and beyond. Learn through interactive animations and flowcharts.

Latest Guides

Click any card to explore an interactive guide.

Understand how Bloom Filters use hash functions and bit arrays to answer membership queries with zero false negatives, perfect for space-constrained systems.

Client-Server Architecture

Client-Server Architecture is the foundational model of modern networked applications — clients send requests, servers process and respond. Understanding this model is the first step to mastering distributed systems, APIs, and scalable web applications.

A comprehensive guide to Forward Proxy and Reverse Proxy, their differences, use cases, and how they protect clients and servers.

Microservices Architecture

Breaking down monolithic applications into small, independent, loosely-coupled services.

Monolithic Architecture

A single-unit software architecture where all components are tightly coupled.

Serverless Architecture

Serverless architecture allows building and running applications without managing infrastructure.

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Latest Articles

In-depth reads on AI, systems, and engineering concepts.

Largest Rectangle in Histogram — The Billboard Builder

Dungeon 3, Boss 7. The final boss. Find the largest rectangle in a histogram using a monotonic stack. One of the most famous interview problems, demystified.

Car Fleet — The Highway Convoy

Dungeon 3, Boss 6. Cars on a single-lane highway catch up and form fleets. Sort by position, compute arrival times, and stack-count the fleets.

Daily Temperatures — The Weather Station

Dungeon 3, Boss 5. A meteorologist wants to know how many days until a warmer one. Meet the monotonic stack, the single most useful stack trick you'll learn.

Generate Parentheses — The Architect's Blueprints

Dungeon 3, Boss 4. An architect needs every valid bracket layout for n rooms. Learn how backtracking with two counters generates all valid parentheses without duplicates.

Evaluate Reverse Polish Notation — The Calculator Factory

Dungeon 3, Boss 3. A factory calculator only speaks postfix. Learn how a stack evaluates expressions like 3 4 + 2 * without needing parentheses at all.

Min Stack — The Warehouse Foreman

Dungeon 3, Boss 2. A warehouse foreman needs to know the lightest crate at any moment. Learn how to augment a stack so getMin is O(1), not O(n).

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