Choose the problem you want to submit/test --- you should look at
the problem statement, think about how to solve it, then write code to
solve it. Next test your code via the online testing mechanism.
Click Browse... to choose the file on your local system
you'll test online.
Click test/run to test the program.
If you use this page again you may have to reload/rebrowse
for the program and reselect the problem.