Palindromic Substrings
Explore how to count the number of palindromic substrings in a given string using dynamic programming. Understand the problem constraints and develop efficient algorithms to identify substrings that read the same forwards and backwards. This lesson helps you practice these concepts in a hands-on coding environment.
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Statement
Given a string, s, return the number of palindromic substrings contained in it. A substring is a contiguous sequence of characters in a string. A palindrome is a phrase, word, or sequence that reads the same forward and backward.
Constraints:
s.lengthsconsists of only lowercase English characters.
Examples
Understand the problem
Let’s take a moment to make sure you’ve correctly understood the problem. The quiz below helps you check if you’re solving the correct problem:
What is the number of palindromic substrings in the string “car”?
1
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3
4
Figure it out!
We have a game for you to play. Rearrange the logical building blocks to develop a clearer understanding of how to solve this problem.
Try it yourself
Implement your solution in the following coding playground.
function countPalindromicSubstrings(s) {// Replace this placeholder return statement with your codereturn -1;}export { countPalindromicSubstrings };