This presentation summarizes the Knuth-Morris-Pratt (KMP) algorithm for efficient pattern searching. It begins by explaining the limitations of naive searching approaches. It then introduces the KMP algorithm, which is based on the concepts of proper prefix and suffix to avoid unnecessary character comparisons. The presentation includes a flow chart and code implementation of the KMP algorithm. It concludes by discussing the advantages of KMP in improving time complexity for pattern searching and its applications in areas like text processing, bioinformatics, and data analysis.

1. Efficient Pattern
Searching: Unveiling
the KMP Algorithm
Presented by,
Shreshta D
Siddharth U
Sanketh R
Sentirenba

2. Efficient Pattern Searching using KMP algorithm
Welcome to the presentation on
Efficient Pattern Searching. This
session will unveil the KMP
algorithm with a detailed flow
chart and code explanation.

3. Understanding Pattern Searching
Before diving into the KMP algorithm,
let's understand the importance of
efficient pattern searching in various
applications. It plays a crucial role in
text processing, bioinformatics, and
data analysis.

4. Challenges of Naive
Approach
The naïve pattern searching method
has limitations in terms of time
complexity. It involves unnecessary
comparisons, resulting in
. This leads to the need for
a more optimized approach.

5. Introducing KMP
Algorithm
The
is a powerful pattern
searching technique that improves
efficiency by avoiding unnecessary
character comparisons. It is based on
the concept of proper prefix and
proper suffix.

6. Approaching the KMP algorithm

7. Understanding Proper Prefix and Suffix
• Let us consider the string ‘abcdabeabf’
• As an exercise, create the LPS table of the
pattern - "ababd"

8. Understanding Proper Prefix and Suffix
How do the iterators move?
•If there is a match, increment both i and j.
•If there is a mismatch after a match,
place j at LPS[pattern[j - 1]] and compare
again.
•If j = 0, and there is a mismatch,
increment i.

9. Understanding Proper Prefix and Suffix
String: ‘ababcabcababababd’ Pattern: ‘ababd’

10. Understanding Proper Prefix and Suffix

11. Flow Chart of KMP Algorithm

12. Code Implementation of KMP Algorithm

13. Code Implementation of KMP Algorithm

14. Application in Real-World
Scenarios
It's uses are :
1.Checking for Plagiarism in
documents, etc.
2.Bioinformatics and DNA
sequencing
3.Digital Forensics
4.Spelling checkers
5.Spam filters
6.Search engines, or for searching
content in large databases
7.Intrusion detection system

15. Advantages of KMP
Algorithm
•A very obvious advantage of
the KMP algorithm is it's time complexity. It's
very fast as compared to any other exact string
matching algorithm.
•No worse case or accidental inputs exist here.

16. Disadvantages of KMP
Algorithm
•A very obvious advantage of
the KMP algorithm is it's time complexity. It's
very fast as compared to any other exact string
matching algorithm.
•No worse case or accidental inputs exist here.

17. In conclusion, the stands as a
cornerstone in the realm of
. Its optimization techniques and
practical applications make it an indispensable
tool for various industries.
Conclusion

18. Thank you!