Package g0601_0700.s0647_palindromic_substrings

Class Solution

java.lang.Object

g0601_0700.s0647_palindromic_substrings.Solution

public class Solution
extends Object

647 - Palindromic Substrings.<p>Medium</p> <p>Given a string <code>s</code>, return <em>the number of <strong>palindromic substrings</strong> in it</em>.</p> <p>A string is a <strong>palindrome</strong> when it reads the same backward as forward.</p> <p>A <strong>substring</strong> is a contiguous sequence of characters within the string.</p> <p><strong>Example 1:</strong></p> <p><strong>Input:</strong> s = &ldquo;abc&rdquo;</p> <p><strong>Output:</strong> 3</p> <p><strong>Explanation:</strong> Three palindromic strings: &ldquo;a&rdquo;, &ldquo;b&rdquo;, &ldquo;c&rdquo;.</p> <p><strong>Example 2:</strong></p> <p><strong>Input:</strong> s = &ldquo;aaa&rdquo;</p> <p><strong>Output:</strong> 6</p> <p><strong>Explanation:</strong> Six palindromic strings: &ldquo;a&rdquo;, &ldquo;a&rdquo;, &ldquo;a&rdquo;, &ldquo;aa&rdquo;, &ldquo;aa&rdquo;, &ldquo;aaa&rdquo;.</p> <p><strong>Constraints:</strong></p> <ul> <li><code>1 <= s.length <= 1000</code></li> <li><code>s</code> consists of lowercase English letters.</li> </ul>

Constructor Summary

Constructors

Constructor	Description
Solution()

Method Summary

Modifier and Type	Method	Description
int	countSubstrings(String s)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

Solution

public Solution()

Method Details

countSubstrings

public int countSubstrings(String s)