Datasets:
license: apache-2.0
language:
- en
configs:
- config_name: default
data_files:
- split: train
path: data/train-*
dataset_info:
features:
- name: source
dtype: string
- name: problem
dtype: string
- name: generation
dtype: string
splits:
- name: train
num_bytes: 249426162
num_examples: 15172
download_size: 109919239
dataset_size: 249426162
dp_removed_OpenR1-Math-220k
Derived from open-r1/OpenR1-Math-220k, default/train at e4e141ec9dea9f8326f4d347be56105859b2bd68. Original source card: source_card.md.
15172 problems, 27739 retained traces. One row per problem; generations contains ALL retained traces. Parallel arrays refer to those traces; generation_indices records original positions. Text is unchanged. Only math-verify-correct traces are included. Explicit length stops and incomplete reasoning are excluded. Missing finish reason policy: drop; fallback does not prove the final answer was untruncated and is identified in completion_evidence.
Length <= 20480 using Qwen/Qwen2.5-3B at 3aab1f1954e9cc14eb9509a215f9e5ca08227a9b: tokens(problem) + tokens(generation), without special tokens, chat formatting, padding or truncation. Training templates add overhead.
Train/eval overlap removal: normalization v2, distinct 8-grams, coverage >= 0.7 per evaluation problem. Short eval problems use normalized exact substring matching. References: AIME 2024/2025/2026, AMC23, MATH-500; exact pins in provenance.json. No within/between-training deduplication or blanket source-label exclusions. See filter_report.json and decontamination_report.json for counts, matches and near misses.