题解 | #单词倒排#

import java.util.*;
public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String s = scanner.nextLine();
        String a = "";
        List<String> list = new ArrayList<>();
        for (int i = 0; i < s.length(); i++) {
            if ((s.charAt(i) >= 65 && s.charAt(i) <= 90) || (s.charAt(i) >= 97 && s.charAt(i) <= 122)) {
                a += s.charAt(i);
                if (i == s.length() - 1) {
                    list.add(a);
                }
            } else {
                if (a != "") {
                    list.add(a);
                }
                a = "";
            }
        }
        for (int i = 0; i < list.size(); i++) {
            System.out.print(list.get(list.size() - 1 - i) + " ");
        }
    }
}