题解 | #单词倒排#

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 in = new Scanner(System.in);

        String input = in.nextLine();

        char[] chars = input.toCharArray();

        for (int i = 0; i < chars.length; i++) {
            char c = chars[i];
            if (!((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'))) {
                chars[i] = ' ';
            }
        }

        input = new String(chars);

        String[] split = input.split(" ");
        for (int i = split.length - 1; i > 0; i--) {
            System.out.print(split[i] + " ");
        }
        System.out.println(split[0]);
    }
}