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For which of the following, the length of the string is not equal to the length of the longest palindromic subsequence?

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in Data Structures & Algorithms II by (76.6k points)
For which of the following, the length of the string is not equal to the length of the longest palindromic subsequence?

(a) A string that is a palindrome

(b) A string of length one

(c) A string that has all the same letters(e.g. aaaaaa)

(d) Some strings of length two

This question was addressed to me in an international level competition.

This is a very interesting question from Longest Palindromic Subsequence topic in chapter Dynamic Programming of Data Structures & Algorithms II

1 Answer

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The correct choice is (d) Some strings of length two

The explanation is: A string of length 2 for eg: ab is not a palindrome.

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