# SECCON 2014 : Choose the number

numbers.py

#!/usr/bin/python
import socket

p = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
p.connect(("number.quals.seccon.jp", 31337))

while True:
	result = p.recv(2048)
	
	if "?" not in result:
		print "[*] {0}".format(result)
		print "[*] flag: {0}".format(p.recv(2048))
		break

	result = result.splitlines()
	question = result[1]
	numbers = map(int, result[0].replace(' ', '').split(','))

	if "maximum" in question:
		p.send("{0}\n".format(max(numbers)))
		print "[*] maximum sended"
	elif "minimum" in question:
		p.send("{0}\n".format(min(numbers)))
		print "[*] minimum sended"
	else:
		print "[*] error"