275. Palindromic Substrings
MediumString
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.
Examples
Input: aaa
Output: 6
Explanation: Palindromes: a, a, a, aa, aa, aaa = 6.
Constraints
- 1 <= s.length <= 1000
- s consists of lowercase English letters.
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