Hi! I'm new here, and I don't really understand hacks, what they are, how to hack, what to hack, who is the defender, what does he do, how to become one, etc. Simply said, I know nothing about hacks! Welcome to codeforces :) hacking is to give a testcase that makes a solut...
When you send your code, during round it works on some relatively small tests set, after the contest is finished your last successful submission for each problem is retested on expended tests set (it also includes all successful hacks). This system exists to lessen delays in testing queue. ...
In a recent contest:Codeforces Round 871 (Div. 4), I saw a“Successful hacking attempt”in the“Hacks”list. But I think this hacking might involve cheating. Look at this hacked submission:204925830. The source code of the defender contained a“landmine”, which means that for some corner ...
Once i was ~2000 place(which is very rare for me), but after contest my solution for problem A was dropped. Carrot showed ~+70, but after hacks it straightly went into negative side. :( → Reply Codeforces (c) Copyright 2010-2025 Mike Mirzayanov The only programming contests Web 2.0 pl...
after the contest is finished your last successful submission for each problem is retested on expended tests set (it also includes all successful hacks). This system exists to lessen delays in testing queue. In my mind the problem behind this system is that during the round you see if your ...