def __init__(self, i_prev, i_next, feeGrowthOutside):
    '\n        :type i_prev: int\n        :type i_next: int\n        '
    self.i_prev = i_prev
    self.i_next = i_next
    self.Delta_L = 0
    self.feeGrowthOutside = feeGrowthOutside
    self.n_positions = 0
:type i_prev: int
:type i_next: int
def __init__(self, i_prev, i_next, feeGrowthOutside):
    '\n        :type i_prev: int\n        :type i_next: int\n        '
    self.i_prev = i_prev
    self.i_next = i_next
    self.Delta_L = 0
    self.feeGrowthOutside = feeGrowthOutside
    self.n_positions = 0