def alpha(self, p):
    '\n        Lazily compute max(d(p), d(p+1)).\n        '
    return max(self.d(p), self.d((p + 1)))
Lazily compute max(d(p), d(p+1)).
def alpha(self, p):
    '\n        \n        '
    return max(self.d(p), self.d((p + 1)))