["region:us"]
[{"name": "problem_id", "dtype": "string"}, {"name": "name", "dtype": "string"}, {"name": "problem", "dtype": "string"}, {"name": "solutions", "sequence": "string"}, {"name": "test_cases", "dtype": "string"}, {"name": "difficulty", "dtype": "string"}, {"name": "language", "sequence": "string"}, {"name": "source", "dtype": "string"}, {"name": "num_solutions", "dtype": "int64"}]