| --- |
| license: mit |
| task_categories: |
| - text-generation |
| language: |
| - en |
| pretty_name: LeetCode Code-Gen (Java) |
| size_categories: |
| - 1K<n<10K |
| tags: |
| - code |
| - java |
| - leetcode |
| - algorithms |
| - code-generation |
| - competitive-programming |
| - instruction-tuning |
| - sft |
| --- |
| |
| # LeetCode Code-Gen Dataset — Java |
|
|
| 4068 rows. Given a problem statement, its input/output examples, and a |
| required algorithm/technique, generate a correct Java solution. |
|
|
| Part of a 4-language collection built from the same source: see the sibling |
| [Python](https://huggingface.co/datasets/AmareshHebbar/leetcode-codegen-python), |
| [Java](https://huggingface.co/datasets/AmareshHebbar/leetcode-codegen-java), |
| [C++](https://huggingface.co/datasets/AmareshHebbar/leetcode-codegen-cpp), and |
| [JavaScript](https://huggingface.co/datasets/AmareshHebbar/leetcode-codegen-javascript) |
| datasets. |
|
|
| ## Verification |
|
|
| **Not execution-verified.** There is currently no compiler/runtime harness for this language in the build pipeline (only Python has one). Rows are extracted directly from named solution approaches in [doocs/leetcode](https://github.com/doocs/leetcode), a well-maintained community solutions repo, so correctness is likely but not guaranteed. Treat this the way you'd treat any unverified scraped code dataset. |
|
|
| ## Source |
|
|
| Extracted from [doocs/leetcode](https://github.com/doocs/leetcode), which |
| documents multiple named solution approaches per problem (e.g. "Dynamic |
| Programming", "Two Pointers", "Divide and Conquer") -- this is what makes |
| per-row algorithm labeling possible, since the same problem can appear |
| multiple times with a different technique and different code each time. |
|
|
| ## Fields |
|
|
| | field | description | |
| |---|---| |
| | `slug` | LeetCode problem slug | |
| | `solution_id` | unique id: problem + approach index + language | |
| | `primary_algorithm` | normalized algorithm/technique label | |
| | `verified` | `true`/`false` for Python (execution-checked), `null` for other languages | |
| | `messages` | chat-format (system/user/assistant), ready for SFT | |
|
|
| ## Example row |
|
|
| ```json |
| { |
| "slug": "house-robber", |
| "primary_algorithm": "Dynamic Programming", |
| "messages": [ |
| {"role": "system", "content": "You are a competitive programming assistant..."}, |
| {"role": "user", "content": "### Problem\n...\n### Algorithm\nDynamic Programming"}, |
| {"role": "assistant", "content": "```java\n...\n```"} |
| ] |
| } |
| ``` |
|
|
| ## Known gaps |
|
|
| - SQL/database problems excluded (wrong problem type for a code-execution harness) |
| - Design/class problems (LRU Cache, iterators) excluded -- they need a |
| sequence of method calls to test, not a single input -> output check |
| - Some `Brute Force` labels are a fallback where the source didn't name a |
| specific technique for that approach |
|
|
