```pydef validate_flag(flag):    encoded_flag = encode_flag(flag)    expected_flag = 'ZT_YE\\0|akaY.LaLx0,aQR{"C'    if encoded_flag == expected_flag:        return True    else:        return False
def encode_flag(flag):    encoded_flag = ""    for c in flag:        encoded_char = chr((ord(c) ^ 0xFF) % 95 + 32)        encoded_flag += encoded_char    return encoded_flag```
I wrote a decoder function which reverses it (thanks to @hollowcrust).
```pydef decode_flag(flag):    decoded_flag = ""    for c in flag:        tmp = (ord(c)-32 + 95) ^ 0xFF        if(tmp > 122) or (tmp < 48):            tmp = (ord(c)-32 + 190) ^ 0xFF        decoded_char = chr(tmp)        decoded_flag += decoded_char    return decoded_flag >>> "flagd1D_U_g3t_tH15_onE?"```
Flag: `flag{d1D_U_g3t_tH15_onE?}`