WPI Worcester Polytechnic Institute

Computer Science Department
------------------------------------------

CS2223 Algorithms 
Homework 6 - B Term 2005

PROF. CAROLINA RUIZ 

Due Date: December 13th, 2005 at 2:00 PM 
See course policy regarding late homework submissions

------------------------------------------

  1. Read Chapter 6 of the textbook in detail.

  2. Problems: You need to turn in a hard copy of your written solutions to the following exercises at the beginning of class on the day the homework is due. Remember to show your work and explain your answers. Correct answers without complete explanations won't receive full credit. Incorrect answers with explanations may receive partial credit.

    1. (50 points + 15 extra credit points) Chapter 6: exercise 5.

      Remember to:

      • (25 points) Provide a detailed description of the DYNAMIC PROGRAMMING idea underlying your algorithm design, and elaborate on why these algorithmic idea is correct (i.e., it solves the problem).
      • (25 points) Provide a detailed algorithm to solve this problem based on your ideas above.
      • (15 extra points) State and prove rigorously what the tighest upper bound of the runtime of your algorithm is.

    2. (50 points)Chapter 6: exercise 7. (Read Chapter's 5 Solved exercise 2 on pp. 244-246 to better understand the problem.)

      Remember to:

      • (17 points) Provide a detailed description of the DYNAMIC PROGRAMMING idea underlying your algorithm design, and elaborate on why these algorithmic idea is correct (i.e., it solves the problem).
      • (17 points) Provide a detailed algorithm to solve this problem based on your ideas above.
      • (16 points) Prove rigorously that your algorithm runs in O(n).