What is an efficient algorithm for regex search all occurrences (starting indexes) of a pattern in a long string?
Say I only have special character * in this question, which matches zero or any numbers of the preceeding characters: https://leetcode.com/problems/regular-expression-matching/
a* search in aaa returns [0, 1, 2]
a*b search in abb [0]
Here a* and a*b are patterns and aaa and abb are text strings to search within and text strings could be very long.
Borrowing https://leetcode.com/problems/regular-expression-matching/ I can only come up with a solution with O(N * N * M)
References:
