[ { "min_n": 5, "max_n": 20, "min_s": 0, "max_s": 30, "min_l": 1, "max_l": 10, "solvable_prob": 0.4 }, { "min_n": 1, "max_n": 10, "min_s": 0, "max_s": 10, "min_l": 1, "max_l": 5, "solvable_prob": 0.5 }, { "min_n": 2, "max_n": 12, "min_s": 5, "max_s": 15, "min_l": 3, "max_l": 6, "solvable_prob": 0.7 }, { "min_n": 4, "max_n": 18, "min_s": 1, "max_s": 25, "min_l": 2, "max_l": 8, "solvable_prob": 0.5 } ]