[
    {
        "min_n": 3,
        "max_n": 25,
        "min_val": 20,
        "max_val": 300
    },
    {
        "min_n": 1,
        "max_n": 10,
        "min_val": 1,
        "max_val": 100
    },
    {
        "min_n": 5,
        "max_n": 20,
        "min_val": 50,
        "max_val": 200
    }
]