Help Mocha to Sort - JAVA

import java.util.*;

public class Test{

    static Scanner sc = new Scanner(System.in);
    public static void main(String[] args) {
        int n = sc.nextInt();
        String s = sc.next();
        helpMochaToSort(n, s);
    }

    public static void helpMochaToSort(int n, String s) {

        ArrayList<Integer> res = new ArrayList<Integer>();
        char[] temp = s.toCharArray();
        Arrays.sort(temp);
        for(int i=0; i < n; i++){
            if(s.charAt(i) != temp[i])
                res.add(i);
        }

        if(res.isEmpty()){
            System.out.println(0);
            return;
        }

        System.out.println(1);
        System.out.print(res.size() + " ");

        for(int a : res)
            System.out.print(a + " ");
        System.out.println();
    }

}