Problem 2523. longest common substring : Skipped character version

Created by rifat

Solve Later

Two strings are given. Find the longest common substring between them. The substring characters need not be adjacent. They, however, must appear in same order in both input strings.

Example:

str1 = 'abcdefghi';
str2 = 'zazbzczd';

output = 'abcd'

Solve

Solution Stats

107 Solutions
44 Solvers

Last Solution submitted on Nov 27, 2025

Last 200 Solutions

Problem Comments

4 Comments

4 Comments

Show 1 older comment

Michael Ryan on 20 Aug 2014

Shouldn't there be two spaces between example and a in y_correct in test 4?

rifat on 20 Aug 2014

right.. corrected. Thanks :)

Alfonso Nieto-Castanon on 29 Sep 2014

perhaps add another test to avoid non-general solutions? (e.g. str1='abaa' str2='aaab' should return 'aaa')

James on 1 Nov 2017

For test 5:

str1 = 'a string with many characters';
str2 = 'zzz zzz zzz zzz zzz';

Why wouldn't the correct answer be four spaces instead of just one?

Solution Comments

Show comments

Problem Recent Solvers44

Problem Tags

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Problem 2523. longest common substring : Skipped character version

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers44

Suggested Problems

More from this Author44

Problem Tags

Community Treasure Hunt

Problem 2523. longest common substring : Skipped character version

Solution Stats

Last 200 Solutions

Problem Comments

Solution Comments

Problem Recent Solvers44

Suggested Problems

More from this Author44

Problem Tags

Community Treasure Hunt

Players