This challenge is designed to be annoying and time consuming to reverse - do not attempt if you value your free time and sanity.
(Yes, you have been warned - the random infinite looping on some wrong inputs is also intended)
(No - the binary does not perform any malicious actions, but some techniques used can trigger some AV solutions)
PS: you need to download Microsoft Visual C++ Redistributable x64 for Visual Studio 2015-2019

得到的flag使用NSSCTF{}格式提交