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Number of pallindromic prefixes efficiently??

Revision en2, by aman_naughty, 2019-08-23 16:26:42

Can someone suggest some method to count the number of prefixes of a given string which are also palindromes? It would be even helpful if I can get a boolean array of the length of string where a true denotes that a prefix up to this index is a palindrome.

Right now I have a simple 2d dp approach where dp[i][j] is true if string i to j is a palindrome, but this is O(n2). Is there some O(n) or O(nlog(n)) method thankyou.

Tags palindrome, prefix, kmp, #help


  Rev. Lang. By When Δ Comment
en2 English aman_naughty 2019-08-23 16:26:42 6
en1 English aman_naughty 2019-08-23 16:25:03 474 Initial revision (published)