def get(self, element: int) -> Optional[int]:
    i = bisect_left(self, element)
    return (self[i] if ((i != len(self)) and (self[i] == element)) else None)
def get(self, element: int) -> Optional[int]:
    i = bisect_left(self, element)
    return (self[i] if ((i != len(self)) and (self[i] == element)) else None)