DSA Decoded

AI-powered tool that breaks down complex data structures and algorithms into simple, visual explanations. Master DSA without the headache.
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Fyumi SaehyunProfile picture@moistrevelry90·Apr 26
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Welcome to DSA Decoded 🧠

Hey, welcome in.


Here's how to get the most out of DSA Decoded:


Community Chat — Ask questions, share your approach to problems, and connect with other people grinding for interviews. No question is too basic.


Updates & Tips — I'll be posting DSA breakdowns, interview tips, and pattern guides here regularly. Turn on notifications so you don't miss anything.


The goal is simple: stop memorizing solutions and start actually understanding the patterns behind them. If you can explain why an approach works, you'll crush any variation they throw at you.


Drop a message in chat and introduce yourself — what company are you targeting? Let's get after it.

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Fyumi SaehyunProfile picture@moistrevelry90·Apr 26

The 5 DSA patterns that solve 80% of LeetCode problems

Most people approach LeetCode wrong. They grind 500 problems and still freeze in interviews.


Here's the thing — there are really only about 5 core patterns you need to internalize. Once you see them, problems stop feeling random:


1. Sliding Window — Any time you're looking at contiguous subarrays or substrings. The key insight is maintaining a window state as you expand/contract.


2. Two Pointers — Sorted arrays, palindromes, pair sums. One pointer from each end, or one fast + one slow.


3. BFS/DFS on graphs & trees — Most tree problems are just "pick BFS or DFS." Graphs are the same thing with a visited set.


4. Dynamic Programming (Bottom-Up) — If a problem has overlapping subproblems, build your solution from the smallest case up. Start with the recurrence, then tabulate.


5. Binary Search (on answer space) — Not just "find element in sorted array." The real power is binary searching on the answer itself when you can define a monotonic condition.


Master these five and you'll recognize the approach for most medium/hard problems within 30 seconds.


I built DSA Decoded to help people drill these patterns with AI-powered explanations that actually make sense — not just "here's the optimal solution, good luck." If you're prepping for interviews, come check it out.