题解 | #参数解析#

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 in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别
        // while (in.hasNextInt()) { // 注意 while 处理多个 case
        //     int a = in.nextInt();
        //     int b = in.nextInt();
        //     System.out.println(a + b);
        // }
        String line = in.nextLine();
        String[] ss = line.split("\"");
        int len = ss.length;
        List<String> list = new ArrayList<>();
        if (line.startsWith("\"")) {
            for (int i = 0; i < len; i++) {
                if (i == len - 1) {
                    String[] subs = ss[i].trim().split(" ");
                    for (int j = 0; j < subs.length; j++) {
                        list.add(subs[j]);
                    }
                } else {
                    list.add(ss[i].trim());
                }
            }
        } else if (line.endsWith("\"")) {
            for (int i = 0; i < len; i++) {
                if (i == 0) {
                    String[] subs = ss[i].trim().split(" ");
                    for (int j = 0; j < subs.length; j++) {
                        list.add(subs[j]);
                    }
                } else {
                    list.add(ss[i].trim());
                }
            }
        } else {
            for (int i = 0; i < len; i++) {
                if (i == 0 || i == len - 1) {
                    String[] subs = ss[i].trim().split(" ");
                    for (int j = 0; j < subs.length; j++) {
                        list.add(subs[j]);
                    }
                } else {
                    list.add(ss[i].trim());
                }
            }
        }
        System.out.println(list.size());
        for (int i = 0; i < list.size(); i++) {
            System.out.println(list.get(i));
        }
    }
}