Watch computer science think

Data. Systems.Algorithms.

DSA here means all three — not just data structures and algorithms. Pointers gliding, packets crossing the wire, a scheduler switching context. Press play and watch the idea unfold.

live
two‑pointers · target 14
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15
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1 + 15 = 16 > 14 — move right in
two‑sum · approaches
Time
O(n²)
Space
O(1)
Work to solve · n = 1,0001,000,000 ops

Check every pair — two nested loops over the array.

↑ tap an approach to leap — the cost falls as you go.
Brute force → better

Never stop at the first answer.

Every problem carries its approaches side by side — the obvious brute force and the sharp optimization. Jump between them in a tap and watch the time and space complexity fall, so you learn the why, not just the trick.

Pick a track

Chai Visual teaches each topic the same way — by animating it. Jump straight in.

New·Interview Prep

A plan for the days you actually have.

Name any subject — DSA, JavaScript, Docker, system design — and get a syllabus drafted for your level and the minutes you actually have, ordered so nothing depends on something you haven’t learnt yet. One honest list each morning; miss a day and it becomes backlog rather than a broken schedule.

interview prep · your plan
Mode
TimedComplete
Days
73045
Per day
124
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14
On track0 / 60 solved · 0%