Algorithms & Data Structures
How to think in steps a machine can follow, and the handful of structures that carry all of computing.
What you'll actually learn
Almost everything in software comes down to a small set of data structures — arrays, hash maps, trees, graphs — and knowing which one fits a problem before you write a line of code. This track builds that judgment from the failure mode up: what actually goes wrong (and how slow it actually gets) when you pick the wrong one, not just the Big-O notation for the right one.
What you'll be able to do
Given a real problem — not a puzzle with a known trick, but something like "this lookup is taking too long as the data grows" — you'll be able to identify which structure is causing the slowdown and why, and swap it for one that actually fits, which is the skill technical interviews are really testing for underneath the whiteboard theatrics.
Syllabus
Leads to
Frequently asked
Roughly 2 hours across 8 hands-on quests — you can go at your own pace and pick up exactly where you left off.
You should be comfortable with Computer Math first — the skill tree unlocks Algorithms & Data Structures once you've cleared those.
Yes — Algorithms & Data Structures is fully available on the free tier, starting with a free first quest and no payment method required to sign up. Plus and Elite remove pacing limits but don't gate any of the Algorithms & Data Structures curriculum behind a paywall.
Create a free account and begin your first quest — no card required.
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