There is a rumor that Arsenal F.C., Talent Yang's favourite team, always likes to set some "mission impossible" tasks for themselves.
For instance, with a 0-2 home defeat against FC Barcelona they must play a great game in Camp Nou to get to the next round of UEFA Champions League. Can they fulfil this task? Decrypt the provided ciphertext to help them!
(The executable of this challenge is similar to that of People's Square , check the slight difference and enjoy solving it)
You should perform 2^32 single round decryption first
得到的flag使用NSSCTF{}格式提交。