题解 | #字符串反转#

import java.util.*;
import java.io.*;

// 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 in = new Scanner(System.in);
        PrintWriter out = new PrintWriter(new BufferedOutputStream(System.out));
        // 注意 hasNext 和 hasNextLine 的区别
        while (in.hasNextLine()) { // 注意 while 处理多个 case
            String line = in.nextLine();
            for (int i = line.length() - 1; i >= 0; --i) {
                out.print(line.charAt(i));
            }
            out.println();
            out.flush();
        }
    }
}