Boredom took over, so I wrote this python file! I didn't want anyone to see it though because it doesn't actually run, so I used the coolest base-16 encoding to keep it secret. python
The first step is clear from the problem statement, unhexlify the file useless.py
Unhexxing it gives:
exec(chr(101)+chr(120)+chr(101)+chr(99)+chr(40)+chr(99)+chr(104)+chr(114)+chr(40) ...)This challenge was probably inspired by everyone (us included) solving Fzz Buzz 2 in a way they didn't intend, by using exec and converting all the banned characters to exec('chr(ascii code)')
So just create a for loop that keeps replacing '+chr(x)' with the actual character
Quickly writing this in useless_solver.py, gives the flag
exec(chr(101)xec(chr(101)xec(chr(102)lag = 'easyctf{python_3x3c_exec_3xec_ex3c}'
priint flag)))There are some errors, due to the left edge case, but its good enough to get the flag without errors! Quick 50 points.