def check_value(data: bytes) -> int:
    # 初始化crc为0xFFFF
    crc = 0xFFFF

    length = len(data)
    if length % 2 != 0:
        return 0
    
    for i in range(0, length, 2):
        val = data[i] * 256 + data[i + 1]
        crc = crc ^ val

    # 返回最终的crc值
    return crc

def check(data: bytes) -> int:
    if len(data) < 2:
        return False
    # 初始化crc为0xFFFF
    crc = 0xFFFF

    length = len(data)
    if length % 2 != 0:
        return 0
    
    for i in range(0, length, 2):
        val = data[i] * 256 + data[i + 1]
        crc = crc ^ val

    # 返回最终的crc值
    if crc == 0 :
        return True
    return False