Lecture 22

Learning objectives

After this class, you should be able to:

1. Given a pattern and a text, apply the Rabin-Karp string matching algorithm to determine all occurrences of the pattern in the text.
2. Give reasons to justify the correctness of the Rabin-Karp algorithm, and derive its time complexity.
3. Use the Rabin-Karp approach to develop algorithms for string-matching problems that are similar to the one discussed in class.

Reading assignment

1. CLR: Section 32.2.
2. CLR: page 916.

Exercises and review questions

• Questions on current lecture's material
  1. CLR exercise 32.2-1.
  2. CLR exercise 32.2-2 (for the case k=2, where both patterns have the same length).
  3. CLR exercise 32.2-3.

Questions on next lecture's material

1. Draw a diagram to show a finite automaton that accepts strings in {0,1}* of even length.

---

Last modified: 2 Aug 2004