👉 http://decoded-app.vercel.app/
I built this as a small way to make DSA feel less like memorizing patterns and more like understanding how problems are actually approached.
Not just what the answer is — but how you get there.
What this is
Decoded breaks problems down step by step.
Instead of jumping straight to the solution, it shows the process:
- how you start thinking about the problem
- how the approach is formed
- how the solution is built gradually
You also get dry runs, so you can follow along as things change — variables, pointers, and state included.
Patterns over repetition
Most DSA problems aren’t completely new. They usually sit inside a few common ideas:
- sliding window
- two pointers
- prefix sum
Once you start noticing these, problems become less about starting from scratch every time, and more about recognizing what’s going on.
Visual breakdowns
Some problems are shown visually so you can actually see the flow.
Like:
- Sliding window expanding and shrinking step by step
- Number of Islands problem showing DFS/BFS across a grid
It’s less about reading the idea and more about watching it happen.
Data structures
I kept this part straightforward.
Just enough to understand how they behave in real problems:
- arrays
- stacks
- queues
- trees
- graphs
- heaps
- hashmaps
No heavy theory — just how and when they show up.
That’s it
Just a slower, clearer way to look at how problems are approached.