text: import signal
  import subprocess
  import os
  from pwn import *
  
  DEVNULL = open(os.devnull, 'wb')
  
  class Alarm(Exception):
      pass
  
  def alarm_handler(signum, frame):
      raise Alarm
  
  signal.signal(signal.SIGALRM, alarm_handler)
  
  p = remote('overflow.eatpwnnosleep.com', 32548)
  
  for i in range(100):
      print 'Stage %d' % i
      p.recvuntil('try\n')
      program = p.recvuntil('(y : safe, n : overflow) > \n', drop=True)
      with open('input', 'w') as f:
          f.write(program)
  
      signal.alarm(4)
      try:
          output = subprocess.check_output(['overflow_checker/target/release/overflow_checker.exe', 'input'], stderr=DEVNULL)
          signal.alarm(0)
      except Alarm:
          print 'timeout'
          output = 'n\n'
      print output
      p.send(output)
      if 'good' not in p.recvline():
          print 'fail...'
  
  p.interactive()
  