I don't know why we run the cheating detection system for Div2A. I got skipped because my submission in Div2A (anhkha2003/204572424) is similar to another submission (YES_wc/204572247). Look at the solving time, I got accepted at 4 mins and YES_wc got accepted at 3:50. How could I copy his code and made all those changes, such as cin and scanf, in like 10 seconds? Also, why do I copy Div2A when I can do Div2D? If I copied all codes for ABCD, the system should detect the coincidence for all 4 problems, not just problem A. Of course, I am not the only one who complains. There are many blogs and comments complaining these days, but nothing happens (False Positive Anti-Cheat Detection, My solutions was skipped). Please fix your algorithm, or at least don't run it on Div2A MikeMirzayanov. Thanks!