Java 代码

import java.util.Scanner;

public class Main
{
    public static void main(String[] args)
    {
        Scanner cin = new Scanner(System.in);

        String s = cin.nextLine();

        String[] w = s.split(" ");

        for (int i = w.length - 1; i >= 0; i --)
            System.out.print(w[i] + " ");
    }
}