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1. [25pts] Compile the program above, and run it several times like this:

   time java HW0

   and then run it several times like this:

   time java HW0 X

   Compare the "real" times (which is actual seconds passed) for running with and without the commandline argument X (ignoring the crashes that may occasionally occur. Explain why it runs faster without the command-line argument.
2. [25pts] Continuing with the above program, why does it crash occasionally when run with the command-line argument X?
3. [10pts EC] Super challange: modify the Queue class (not HW0.java) so that HW0 doesn't crash when run with the command-line argument X? (attach code if you were successful)
4. [50pts] Modify the main() below to use Iterators to print out the elements of the TreeSet. You'll want to look at Java API documentation for TreeSet.
   Submit as: TO APPEAR