Homework Assignment 3 Grading:

Comments to add to student's gradesheet (as an overall comment):
  Good job!
  No work submitted.

Note: for each question or question part that a student gets completely correct,
make sure to add the comment:
  Good job!
so the student's gradefile contains some feedback for that question/question part

Some comments that may be of use:
  Note: curr != null check not required, as boundary conditions have been verified.
  Note: Innovative solution to reduce loop time.
  Note: Inefficient, although correct, solution. See posted solution.
  Note: Instantiation of DblListnode not required.