brainf 解释器，但它是一个 Python 表达式
(lambda cod, _, inp: (lambda *, _cp = 0, _mp = 0, _ip = 0, _mem = {}, _inp = inp
.encode(), _out = b"": next(__import__("sys").stdout.buffer.write(_out) and None
or None for _ in __import__("itertools").count() if not (_mem.__setitem__(_mp, (
(_mem[_mp] if _mp in _mem else 0) + (1 if cod[_cp] == "+" else -1 if cod[_cp] ==
"-" else 0)) & 255) and 0 or (_mp := _mp + (1 if cod[_cp] == ">" else -1 if cod[
_cp] == "<" else 0)) and 0 or ((_cp := (lambda si, *, _d = 0: next(i for i in (
range(si, len(cod)) if cod[si] == "[" else range(si, -1, -1)) if cod[i] in "[]"
and ((_d := _d + (1 if cod[i] == "[" else -1)) == 0)))(_cp)) if cod[_cp] in "[]"
and bool(_mem[_mp] if _mp in _mem else 0) == bool(cod[_cp] == "]") else 0) and 0
or ((_out := _out + bytes((_mem[_mp],))) if cod[_cp] == "." else _mem.__setitem__
(_mp, _inp[_ip]) and 0 or (_ip := _ip + 1) if cod[_cp] == "," and _ip < len(_inp)
else 0) and 0 or (_cp := _cp + 1) < len(cod))))())(*__import__("sys").stdin.read
().partition("!"))