Study Roadmap

Click a topic to see its problems, its prerequisites and the cheatsheets that cover it. The list picker swaps which problems each topic shows — the curated roadmap path, or one of the well-known sets filed onto the same topics. Only the roadmap path has a teaching order, so only it shows locks: a topic unlocks once everything it depends on is finished, and the lock is a suggestion, not a gate. A faded topic is one the selected list has nothing filed under, and a · in place of a language link means this repo has no solution for that problem yet. Progress comes from two places. The practice log is the record: a problem whose latest verdict there is ok is shown as done, and one marked again is badged as still in progress — neither can be changed from this page, and both move the day the log does. A tick is for what the log has not judged; it is keyed by problem, so it counts on every list and every topic the problem appears on, and it is stored in this browser only and never uploaded.