Upload dataset_metadata.json

dataset_metadata.json

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+{
+  "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
+    }
+  }
+}