Learning mathematics sometimes has a very uncomfortable feeling: if you can't think of something, you will spend a long time thinking about it (for a day or several days in a row) and% ...
In fact, sometimes people will fall into such a strange circle. You might as well change your way of thinking. Sometimes it doesn't mean that having your own ideas will definitely come to an end. Some roads are impassable, just like a maze. Besides, thinking is not a bad thing, and it won't make people feel worthwhile.