题解 | #回文子串#

回文串都可以用这个套路做啊！！！

import java.util.*;
public class Main{
    public static void main(String[] args){
        Scanner input = new Scanner(System.in);
        String s = input.next();
        char[] list = s.toCharArray();
        int j=0;
        int re=0;
        int[][] we = new int[list.length][list.length];
        for(int i =0;i<list.length;i++){
            we[i][i] = 1;
            re++;
        }
        for(int l =2;l<=list.length;l++){
            for(int i = 0 ;i<list.length;i++){
                j = l+i -1;
                if(j >=list.length){
                    break;
                }
                if(list[i] != list[j]){
                    we[i][j] = 0;
                }else{
                    if(j-i<2){
                        we[i][j] = 1;
                        
                    }
                    else{
                        we[i][j] = we[i+1][j-1];
                    }
                }
                if(we[i][j] == 1){
                    re++;
                }
            }
        }
        System.out.print(re);
    }
}