137 lines
4.2 KiB
Markdown
137 lines
4.2 KiB
Markdown
# study_deck_02
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An Anki-exportable study deck for NeetCode DSA problems.
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## How It Works
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1. **Roadmap** (`roadmap.org`) — the tracker. Lists all NeetCode 150 topics
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and problems. Toggle `TODO` → `DONE` with `g c c` in Emacs as you
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complete each one. Progress cookies (`[/]`) show topic completion.
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2. **Notes** (`dsa/<topic>/<problem>.org`) — the real work. Each problem
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has its own file with:
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- Approach notes (write your own)
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- Python and C++ solution stubs
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- A `NEETCODE` property linking back to the roadmap
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3. **Study flow** — open roadmap.org, pick a topic, pick a problem,
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follow the Notes link, solve it, mark it DONE in both places.
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## File Layout
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```
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org/study_deck_02/
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├── AGENTS.md ← you are here
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├── roadmap.org ← generated by leetcode/extract.mjs
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├── toolkit/
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│ └── tricks.org ← common patterns & templates
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└── dsa/
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├── arrays-hashing/
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│ ├── 0217-contains-duplicate.org
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│ └── ...
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├── two-pointers/
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├── sliding-window/
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├── linked-list/
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├── binary-search/
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├── stack/
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├── trees/
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├── tries/
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├── heap-priority-queue/
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├── backtracking/
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├── graphs/
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├── advanced-graphs/
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├── 1-d-dynamic-programming/
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├── 2-d-dynamic-programming/
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├── greedy/
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├── intervals/
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├── math-geometry/
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└── bit-manipulation/
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```
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18 topics, 199 problems (NeetCode 150).
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## The `#+PROPERTY: STUDY_DECK_02` Header
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Every `.org` file in this deck has `#+PROPERTY: STUDY_DECK_02` at the
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top. This tells org-anki which Anki deck to export into. Without it,
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the file won't be picked up by the exporter.
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## Roadmap Format
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Each problem in roadmap.org uses a properties drawer to keep links tidy:
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```org
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** TODO 0217. Contains Duplicate :easy:
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:PROPERTIES:
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:LEETCODE: [[https://leetcode.com/problems/contains-duplicate/][Problem]]
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:CPP: [[https://github.com/neetcode-gh/leetcode/blob/main/cpp/0217-contains-duplicate.cpp][Solution]]
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:PYTHON: [[https://github.com/neetcode-gh/leetcode/blob/main/python/0217-contains-duplicate.py][Solution]]
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:VIDEO: [[https://youtube.com/watch?v=3OamzN90kPg][Watch]]
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:END:
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Notes: [[dsa/arrays-hashing/0217-contains-duplicate.org][My Solution]]
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```
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Properties are hidden by default in Emacs (`TAB` to cycle). The Notes
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link is always visible — that's the one you click most.
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## Notes Format
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Each problem note links back to the roadmap via the `NEETCODE` property:
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```org
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* TODO 0217. Contains Duplicate :easy:
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#+PROPERTY: STUDY_DECK_02
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:PROPERTIES:
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:NEETCODE: [[../../roadmap.org::*0217. Contains Duplicate][Roadmap]]
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:END:
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** TODO Approach
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Write your approach here.
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** TODO Python
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#+begin_src python
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#+end_src
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** TODO C++
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#+begin_src cpp
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#+end_src
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```
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## Regenerating
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From the `leetcode/` directory:
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```bash
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node extract.mjs # fetches fresh data, writes roadmap.org here
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node scaffold-notes.mjs # creates missing note files (skips existing)
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```
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Extract pulls from neetcode.io (cached in `leetcode/.cache/`). Scaffold
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is idempotent — it only creates files that don't exist yet.
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## Growing the Deck
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This deck starts with NeetCode 150. To add more:
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- **More problems** — edit `extract.mjs` to include `neetcode250` or
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`blind75` flags, or remove the `neetcode150` filter entirely.
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- **Custom topics** — add new folders under `dsa/`, create notes manually.
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- **Other sources** — create new folders alongside `dsa/` (e.g.,
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`euler/`, `advent-of-code/`) with the same `#+PROPERTY: STUDY_DECK_02`
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header. They'll all export to the same Anki deck.
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- **Flashcards** — add `** Front` / `** Back` sections to any note
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for Anki-style cards (see root `AGENTS.md` for format).
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## Backlinking Convention
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Every `.org` file should link back to `roadmap.org` via a property:
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- Problem notes use `:NEETCODE:` linking to the roadmap heading
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- Toolkit/tricks use `:ROADMAP:` linking to a relevant problem
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- Roadmap entries use `:TRICK:` linking to relevant tricks
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This keeps the web of links navigable in both directions — from
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roadmap to notes, from notes to tricks, and tricks back to problems.
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