题解 | #参数解析#

while True:
    try:
        s = input()
        flag, temp, args = False, '', []
        for c in s + ' ':
            if c == '"':
                # 如果遇到引号，若标志位flag被打开，则关闭；否则将其开启
                flag = False if flag else True
                continue
            if c != ' ':
                temp += c
            else:
                if flag:
                    temp += c
                else:
                    args.append(temp)
                    temp = ''
        print(len(args))
        for a in args:
            print(a)
    except:
        break