Palindromic Substrings
Detailed guide and Python implementation for the 'Palindromic Substrings' problem.
Problem Statement
Given a string s, return the number of palindromic substrings in it.
A string is a palindrome when it reads the same backward as forward. A substring is a contiguous sequence of characters within the string.
Write a function countSubstrings(s: str) -> int.
- •1 <= len(s) <= 1000
- •s consists of lowercase English letters
Examples
s = "abc"
3
Three palindromic substrings: "a", "b", "c".
s = "aaa"
6
Six palindromic substrings: "a", "a", "a", "aa", "aa", "aaa".
Need a Hint?
Edge Cases to Watch
- Empty input structures
- Single element inputs
- Large numerical bounds
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