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  *[[http://www.cs.purdue.edu/homes/xyzhang/spring13/hw1.pdf|Homework One.]] [[http://www.cs.purdue.edu/homes/xyzhang/spring13/hw1-solutions.pdf|Solutions.]] 
  *[[http://www.cs.purdue.edu/homes/xyzhang/spring13/hw2.pdf|Homework Two.]][[http://www.cs.purdue.edu/homes/xyzhang/spring13/hw2-solution-new.pdf|Solutions.]]
  *[[http://www.cs.purdue.edu/homes/xyzhang/spring13/hw3.pdf|Homework Three.]][[http://www.cs.purdue.edu/homes/xyzhang/spring13/hw3_solution.pdf|Solutions.]]
  *[[http://www.cs.purdue.edu/homes/xyzhang/spring13/hw4.pdf|Homework Four.]][[http://www.cs.purdue.edu/homes/xyzhang/spring13/hw4-solution.pdf|Solutions.]]