When I participated in the round yesterday (midnight), after I solved D and had no idea for E, I locked A and tried to make hacks. And then all my Codeforces pages were stuck and kept showing "Just a moment..." "Checking your browser..." "It takes longer time...". I spent the last 15 minutes doing nothing. I felt lucky to submit D before the IP ban. Any ideas?
Yes, I did use vpn. But it's strange when I turned on vpn after the contest ended the IP ban went away. I made the direct connection during the contest.
No, I wasn't sharing wifi with someone else during the contest.
Bump, is there anyone who knows some good ways to bypass cloudflare interception?
Me too. It costed me 15 minutes of time in the first 40 minutes of the contest. Even the {m1, m2, m3}.codeforces.com servers were being blocked.
This happens to me every time there is a contest — Codeforces is completely inaccessible during each contest, no exceptions. Sometimes, using a browser without any tracking protection used to work, but that is not a solution I'm willing to use.
Mike probably misconfigured Cloudflare quite a while back.