import requests
from itertools import product
import time
from urllib import urlencode

cookies={"PHPSESSID":"79ttdtubrua06uec35m0bsip67"}
url="https://ctf.zsis.hr/challenges/4_programming_mugatu.php"

start=time.time()
r=requests.get(url,cookies=cookies)
target=int(r.text.split("resulting number ")[1].split("?")[0])
print r.text,target

arr=range(1,10)
for i in product(["-","+",""],repeat=len(arr)-1):
    s=""
    for j in zip(arr,i):
        s+=str(j[0])+j[1]
    s+="9"
    if int(eval(s))==target:
        print target==eval(s),time.time()-start
        print s
        time.sleep(0.5)
        r=requests.get(url+"?"+urlencode({'answer':s}),cookies=cookies)
        print r.text
        break