update readme.md

README.md

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----
-license: cc-by-4.0
----
+---
+license: cc-by-4.0
+---
+
+# LiveOIBench Contestants
+
+LiveOIBnehch consists of 403 coding problems collected directly from the official websites of 72 competitions across 14 renowned Informatics Olympiads, focusing on contests held from 2023 onward. We collect all the offical test cases, human contestant ranking results, and contestant Codeforces profiles.
+
+Please refer to the [paper](https://arxiv.org/abs/2510.09595) for more details and the [leaderboard](https://liveoibench.github.io/leaderboard.html) for the most up-to-date models' performance.
+
+## Usage
+
+Please see this [Github repository](https://github.com/LiveOIBench/LiveOIBench-Evaluation) for downloading and processing the dataset.
+
+## Files
+
+- `data/contest_results.parquet` – contest‑level table containing medal thresholds and participant rankings.
+
+## Schema
+
+Each row in `contest_results.parquet` has the following fields:
+
+- `contest_id`: Identifier for the contest, typically of the form
+  `<COMPETITION>-<YEAR>-<ROUND>`.
+- `gold_cutoff`: Lowest total score that received a gold medal in
+  this contest.
+- `silver_cutoff`: Lowest total score that received a silver medal.
+- `bronze_cutoff`: Lowest total score that received a bronze medal.
+- `division`: Division label for the contest (for example
+  `"Division 1"`, `"Division 2"`), when applicable.
+- `contestants_ranking`: JSON‑encoded list of per‑contestant
+  records. Each record contains ranking information such as:
+  - `Rank` (integer rank within the contest).
+  - `Contestant` (name or identifier).
+  - `Country` (country or team).
+  - Per‑problem scores (one column per problem code).
+  - `Total` (aggregate contest score).
+  - `Medal` (medal type or participation status).
+  - `CF_Rating` (optional external rating when available).
+- `date`: Contest date.
+- `num_contestants`: Number of contestants included in the ranking
+  for that contest.
+- `problems`: JSON‑encoded list of problem identifiers appearing in
+  the contest, typically matching `problem_id` values from LiveOIBench.
+
+
+## License
+
+This project is licensed under CC-BY-4.0. Please respect the original contest rules and attribution when using the
+problems.
+
+## Citation
+
+If you find LiveOIBench and the repo useful in your work, please cite:
+
+```bibtex
+@article{zou2025liveoibench,
+  title={LiveOIBench: Can Large Language Models Outperform Human Contestants in Informatics Olympiads?},
+  author={Zou, Kaijian and Xiong, Aaron and Zhang, Yunxiang and Zhang, Frederick and Ren, Yueqi and Yang, Jirong and Lee, Ayoung and Bhushan, Shitanshu and Wang, Lu},
+  journal={arXiv preprint arXiv:2510.09595},
+  year={2025},
+  url={https://arxiv.org/abs/2510.09595},
+  doi={10.48550/arXiv.2510.09595}
+}
+```

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