[
    {
        "a_min": 2,
        "a_max": 1000000,
        "b_min": 1,
        "b_max": 1000000000,
        "k_min": 1,
        "k_max": 10000,
        "f_min": 1
    },
    {
        "a_min": 10,
        "a_max": 200000,
        "b_min": 100,
        "b_max": 200000000,
        "k_min": 10,
        "k_max": 2000,
        "f_min": 3
    },
    {
        "a_min": 20,
        "a_max": 100000,
        "b_min": 200,
        "b_max": 100000000,
        "k_min": 20,
        "k_max": 1000,
        "f_min": 5
    },
    {
        "a_min": 15,
        "a_max": 150000,
        "b_min": 150,
        "b_max": 150000000,
        "k_min": 15,
        "k_max": 1500,
        "f_min": 4
    }
]