{
  "dataset_info": {
    "source": "Codeforces Problemset",
    "creation_date": "2025-08-15T10:42:22.546174",
    "total_problems": 10556,
    "splits": {
      "train": 6333,
      "validation": 2111,
      "test": 2112
    }
  },
  "columns": {
    "contest_id": "Contest identifier",
    "index": "Problem index within contest (A, B, C, etc.)",
    "problem_id": "Unique problem identifier (contest_id + index)",
    "title": "Problem title",
    "rating": "Problem difficulty rating",
    "tags": "Problem categories/tags",
    "statement": "Main problem description",
    "input_spec": "Input specification",
    "output_spec": "Output specification",
    "note": "Additional notes",
    "sample_tests": "Example input/output",
    "difficulty_category": "Categorised difficulty level",
    "tag_count": "Number of tags assigned",
    "statement_length": "Length of problem statement",
    "input_spec_length": "Length of input specification",
    "output_spec_length": "Length of output specification",
    "contest_year": "Approximate contest year"
  },
  "statistics": {
    "rating_distribution": {
      "count": 10556.0,
      "mean": 1818.1129215611975,
      "std": 774.9816586449926,
      "min": 0.0,
      "25%": 1200.0,
      "50%": 1800.0,
      "75%": 2400.0,
      "max": 3500.0
    },
    "difficulty_distribution": {
      "Beginner": 1939,
      "Medium": 1901,
      "Hard": 1839,
      "Easy": 1707,
      "Master": 1636,
      "Expert": 1534
    },
    "top_tags": {
      "greedy": 3210,
      "math": 3174,
      "implementation": 2899,
      "dp": 2315,
      "constructive algorithms": 1922,
      "data structures": 1895,
      "brute force": 1864,
      "binary search": 1185,
      "sortings": 1164,
      "graphs": 1154
    },
    "average_statement_length": 942.3583743842364,
    "contest_range": {
      "min": 1,
      "max": 2131
    }
  }
}