Longest Palindromic Subsequence Problem Statement
Given a string A
consisting of lowercase English letters, determine the length of the longest palindromic subsequence within A
.
Explanation:
- A subsequence is derived from a string by deleting some or no characters without changing the order of the remaining characters.
- A string is a palindrome if it reads the same forwards and backwards (e.g., "abba").
Input:
The first line contains an integer ‘T’, indicating the number of test cases. Each test case consists of a single string ‘A’.
Output:
Output a single integer per test case, representing the length of the longest palindromic subsequence in ‘A’.
Example:
Input:
2
bbabcbcab
dcbccbcabbb
Output:
7
7
Constraints:
- 1 <= T <= 10
- 1 <= N <= 102
- Where ‘T’ represents the number of test cases and ‘N’ represents the length of the string.
- Time limit: 1 second.
Note:
No need to print anything; implement the function to obtain the result.

AnswerBot
4mo
Find the length of the longest palindromic subsequence in a given string.
Use dynamic programming to solve this problem efficiently.
Create a 2D array to store the lengths of palindromic subsequences fo...read more
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