Decide if any suffix of a string is a prefix of another string

Asked Apr 26 '17 at 16:03

Active Apr 26 '17 at 16:18

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How can I check if any suffix of a string is a prefix of an another string, preferably in constant time, if I already built a suffix array of the first string?

Example:

string 1:

abc

string 2:

bcda

bc is a substring of first string, and a prefix of the second.

edited Apr 26 '17 at 16:18

asked Apr 26 '17 at 16:03

Urist McCoder

show some examples and what you tried to solve this problem – Ani Apr 26 '17 at 16:06
Right now, i'm checking every substring if it's a prefix, which is not very efficient, and I don't have a good idea how to do it better. – Urist McCoder Apr 26 '17 at 16:21
which language are you working on ? – Ani Apr 26 '17 at 16:22
In C#, but I just need some general algorithm. – Urist McCoder Apr 26 '17 at 16:28
have you tried using regular expressions ? – Ani Apr 26 '17 at 16:30
Maybe I could use a binary search and check only the suffixes starting with the first letter of the other string, but that's still not in constant time. – Urist McCoder Apr 26 '17 at 16:32

Decide if any suffix of a string is a prefix of another string

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