Rating:

```
# Member: sigmaTau
# Team: MRU CTF
# tofu@rootstorm.com
# https://www.rootstorm.com

from pwn import *

p = remote('pwn64.ctf.ihack.computer', 1234)
p.recv()
octal_value = p.readline_regex("[0-9]{2}")
octal = ''.join([chr(int(i,8)) for i in octal_value.split()])
print(p.recv())
base_64 = b64d(octal)
deca = int(base_64, 0)
p.sendline(str(deca))
print(p.recv())
print(p.recv())
p.interactive()

```

Original writeup (https://www.rootstorm.com/).