It come to my attention that some submissions has a single line of code somewhat like:

if(t == 1000) cout << "HACK IT" << endl;

that was purposely added so that someone could hack it. Some of these are fairly obvious, take a look at these submission made by a same user and are hacked by a same user: 198836228, 198832711, 198836228, 198836778, 198838662.

What are these supposed to mean?