Read a long requirements spec, build it level by level, and get graded by hidden tests. This trains turning prose specs into exact code — not algorithm trivia.
▾
Tier 1 · Getting your hands back
10–15 min · data structure basics0/5 solved
▾
Tier 2 · Data structures + requirements
15–20 min · objects that hold state0/5 solved
▾
Tier 3 · Online assessment style
20–25 min · reading the spec is the hard part0/5 solved
▾
Tier 4 · MLE / ML implementation
25–60 min · build the metric or model yourself0/13 solved
▾
Tier 5 · End-to-end ML systems
55–60 min · training through serving in one class0/6 solved