HW5 grading.

20 points total.

5 points - No || anything in there, just single-threaded.

7 points - Tried to do something ||, but does not compile, and doesn't
  make much sense (e.g., code for pthreads, omp, MPI all mixed together).

10 points - Tried to do something ||, does not compile, but sort of makes 
   sense.

15 points - Code runs, there is some || code, but a logical error makes it 
   give incorrect results.