题解 | #字符逆序#

import java.util.*;

// 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 scanner = new Scanner(System.in);
        String str = scanner.nextLine();
        char[] chars = str.toCharArray();

        for (int i = chars.length - 1; i >= 0; i--) {
            System.out.print(chars[i]);
        }
    }
}