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| package Classify.DP.Medium;
import org.junit.jupiter.api.Test;
public class PalindromicSubstrings {
public int countSubstrings(String s) { int[] dp = new int[s.length()]; dp[0] = 1; for (int i = 1; i < dp.length; i++) { dp[i] = dp[i - 1] + currentCount(s, i); } return dp[s.length() - 1]; }
private int currentCount(String string, int i) { int count = 0; for (int j = i; j >= 0; --j) { if (string.charAt(i) != string.charAt(j)) { continue; } if (new StringBuilder(string.substring(j, i + 1)).reverse().toString().equals(string.substring(j, i + 1))) { ++count; } } return count; }
@Test public void fun() { System.out.println(countSubstrings("aaa")); } }
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