👉https://decoded-app.vercel.app/
When you're learning DSA, there’s a point where things start feeling repetitive.
You solve problems.
You look at solutions.
You understand them.
But a few days later, the same type of problem feels new again.
That usually happens because you're remembering solutions, not the thinking behind them.
Decoded is a small web app built to fix that.
What Decoded tries to do
The goal is pretty simple:
Make it easier to understand how to approach problems — not just how to code the solution.
Instead of dumping answers, it focuses on:
- breaking problems down
- showing how the solution evolves
- helping you recognize patterns
Inside the app
Problems with step-by-step thinking
Each problem comes with:
- a clear explanation
- a structured approach
- a step-by-step dry run
The dry run is the important part.
You can actually follow:
- how variables change
- how pointers move
- how the solution builds up
So you can see everything happen instead of imagining it.
Complexity
Every solution includes:
- time complexity
- space complexity
But instead of just stating Big-O, the focus is on why it’s that value.
Patterns
One of the most useful sections is the Patterns page.
A lot of DSA problems aren’t unique — they’re variations of a few common ideas.
This page groups problems based on patterns like:
- two pointers
- sliding window
- prefix sum
Each pattern explains:
- how it works
- when to use it
- what kind of problems it fits
Over time, you stop thinking “I’ve seen this before”
and start thinking “this looks like a sliding window problem.”
That’s a big difference.
Data Structures
The Data Structures page focuses on fundamentals.
It covers things like:
- arrays
- linked lists
- stacks
- queues
The idea isn’t to go deep into theory, but to keep it practical.
Each structure is explained in terms of:
- what it does
- how it behaves
So instead of just knowing definitions, you start understanding when to use what.
Who this is for
- beginners starting DSA
- people preparing for interviews
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