# No pressure [InterKosenCTF 2020]
###### tags: `InterKosenCTF2020` `misc`
```python=
from ptrlib import Socket
sock = Socket("localhost", 10002)
flag = "KosenCTF"
while flag[-1] != "}":
xs = []
for b in range(0x20, 0x7f):
s = flag + chr(b)
sock.sendlineafter(": ", s)
l = len(sock.recvlineafter(":"))
xs.append((l, s))
flag = sorted(xs)[0][1]
print(flag)
```
やるだけなので特に語ることがない。暗号問題でよく出るよね。実はMySQLとかPostgreSQLにdeflate入っててこういうのを使うSQLiとかできたら面白いのに