I am having a really hard time submitting my code to Topcoder's past problems. I used vjudge.net but it constantly gives me Submit Failed even after I (following some random advice on the web) resubmit it again and again. I also try the web arena and the Java applet but both of them takes forever to load the problem statement.
I am interested in how you are submitting to past Topcoder contests. I am aware that their problems are very good and I don't want to miss all of those learning because of some technical difficulty.