题解 | 单组_字符串

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
       Scanner sc = new Scanner(System.in);
       int n = sc.nextInt();
       sc.nextLine();
       String s = sc.nextLine();

        String reversed = reverseString(s);
        System.out.println(reversed);
        sc.close();
    }
    public static String reverseString(String s){
        StringBuilder sb  = new StringBuilder(s);
        return sb.reverse().toString();
    }
}