Can you program something that is fast enough to submit the solution before the time runs out?
http://timesink.be/speedy
flag: brixelCTF{sp33d_d3m0n}
This was was a bit of a doozy. I originally experimented with Python's requests module, but it didn't work. So I used selenium and downloaded the geckodriver (ver 0.28.0) and whipped up a solution in (in Python ofc).
It's a bit stochastic, so you're gonna have to run the script a few times to get the flag.