[
    {
        "min_n": 4,
        "max_n": 6,
        "max_city": 4
    },
    {
        "min_n": 3,
        "max_n": 10,
        "max_city": 5
    },
    {
        "min_n": 4,
        "max_n": 7,
        "max_city": 6
    },
    {
        "min_n": 4,
        "max_n": 8,
        "max_city": 5
    }
]