[
    [0.1, 1],
    [0.2, 1],
    [0.3, 0.9],
    [0.4, 0.9],
    [0.5, 0.9],
    [0.6, 0.8],
    [0.7, 0.7],
    [0.8, 0.6],
    [0.9, 0.4],
    [1, 0.1],
    [1, 0.2],
    ...
    [0.4, 0.9]
]