young sir

Try them one by one.

Just after entering an A, a line of words popped up on the screen, reminding myself that there is only one chance to answer the question.

"..."

Fang Nan was speechless for a moment.

How can this thing have a limit on the number of times?

He simply squatted down in front of the fire hydrant at the school gate, wanting to think carefully about the correct answer to this question.

one letter……

[Yun Duo has no head: why don't you choose a nice QQ nickname for yourself, just use one letter? 】【f: Can't think of it. 】

[Yun Duo has no head: Why don't you just call it the strongest brain F, anyway, this is what I noted in your phone address book. 】【f:...】

【F: Then why do you call yourself...headless? 】

[Yun Duo has no head: Hahaha, because Yun Duo really has no head. 】【Clouds have no heads: Think about it, are the clouds in the sky all lumpy, with heads and tails completely invisible. ] Surrounded by students who left for evening self-study and parents who came to pick up their children, he didn't know if it was because of the hot weather, he suddenly felt that the summer night wind was a bit hot.

After halfway down the zipper of the school uniform, Fang Nan stood up from the fire hydrant.

[Permission question: a letter? 】

He slid the phone away and pressed the "f" key on the screen.

The front desk of "Neighborhood Education" saw a high school student in a blue and white school uniform walking in the door, and thought it was a Gu Nan student who came to make up lessons, so he just glanced up at him and didn't ask any more questions.

Seeing that the staff at the front desk did not stop him, Fang Nan went directly into the elevator to the second floor.

The latest post in Bi Ziyun's space was sent shortly after the evening self-study.He sent three cloudy emoji emojis in a row, and the location of this post was the "Neighborhood Education" next to No. [-] Middle School.

This training institution is quite large, with five floors in total. There are seven or eight rooms on the second floor alone, most of which have their doors open.Fang Nan searched from room to room along the second floor, but found no sign of Bi Ziyun, so he walked back to the elevator, ready to go up to the third floor to have a look.

As soon as the elevator door opened, there was a man and a woman standing inside, holding lesson plans in their hands, who seemed to be teachers from the institution.

"You still have class so late today?"

Fang Nan walked into the elevator and heard the female teacher talking to the male teacher beside her.

Male teacher: "That's right, there is also Bi Ziyun's mathematics. I was absent last week, so I will make up for him tonight."

The male teacher pressed the button for the fifth floor and looked at Fang Nan who had just entered the elevator: "Student, which floor do you want to go to?"

"..." Fang Nan was stunned for a moment, and immediately said, "It's also on the fifth floor, thank you teacher."

The female teacher got off the elevator halfway, and Fang Nan followed the male teacher all the way to the highest level of Neighborhood Education.

The male teacher got out of the elevator and walked straight towards an open door at the end of the corridor.

In order not to be too deliberate, Fang Nan stopped at the elevator entrance for a few seconds, then turned around and went to the bathroom next to the elevator to wash his hands.When he came out of the bathroom, the door of that room was half closed, and only a few voices of the male teacher could be heard vaguely.

Fang Nan slowed down and walked towards the half-open door at the end of the corridor.

When he walked to the door, he immediately recognized the schoolbag hanging on the doorknob. As long as he saw it, he would know who its owner was.

Fang Nan turned sideways and stood against the wall behind the potted plant at the door of the classroom.From this angle, you can roughly see the situation in the room.

He originally thought that this room, like those on the second floor, was also a classroom for supplementary lessons, but when he glanced over, he found that the room was empty, with only a set of tables and chairs and a small sofa.

Bi Ziyun and the male teacher sat side by side at the desk by the window with their backs to him.There are several textbooks spread out on the desk, and the male teacher is giving him a lecture with a pen.

He noticed that Bi Ziyun's right cheek was slightly swollen, as if he was holding a lollipop in his mouth.Every time the male teacher said a paragraph, Bi Ziyun would falter with "hmmm", nodding his head while writing down two strokes in his notebook, which seemed quite decent.

When Bi Ziyun was in class, she was not very quiet and kept kicking the chair behind her with her heel.The school uniform hanging on the back of the chair was kicked down by him, and the two empty cuffs were dangling in the air.

In addition, there were several textbooks covered with mud neatly spread on the floor. It seemed that Bi Ziyun had no choice but to get rid of the dirt on the book covers. He tried to put the textbooks on the floor to see if they could be dried.

The male teacher bowed his head and said something, but Bi Ziyun couldn't hold back, and laughed out loud with a lollipop in his mouth, which made the whole chair shake.

It seems that he is in a good mood now, and has not been affected by what happened in the evening self-study.

Fang Nan stuffed the Wusan in his hand into the schoolbag on the doorknob, thought for a while, and was about to turn around and leave.

He was about to turn his head when he suddenly found that besides Bi Ziyun's schoolbag hanging on the doorknob of the room, there was also a dinosaur toy tied up with a rope.This dinosaur is missing a leg, and a toothpick is taped to its hind limb, as if someone had performed a small orthopedic operation on it.

Looking at the little dinosaur hanging on the doorknob, Fang Nan stretched out his hand out of nowhere, and gently picked up the little dinosaur.

This little dinosaur showed two rows of big white teeth, a bit like Bi Ziyun's crocodile pillow.Bi Ziyun never went back to his dormitory since he left last time, but he kept his crocodile pillow.

"Ding--"

Fang Nan didn't expect that there would be a wind chime hanging behind the little dinosaur's tail, and when he stretched out his hand like this, the wind chime would also ring.

The tutoring teacher was still bowing his head while lecturing, and didn't notice any movement outside the door.But Bi Ziyun turned his head curiously when he heard the sound of wind chimes coming from the door.

Seeing Bi Ziyun turn to look at the door, Fang Nan was stunned for a moment, and immediately let go of his hand.He immediately left the spot, turned around and walked towards the elevator at the end of the corridor.

A touch of blue school uniform flashed past the door, and disappeared in an instant.

"Therefore, when n=k+1, their proposition is valid——Bi Ziyun?"

As soon as the teacher finished speaking, Bi Ziyun pushed away the chair behind him and stood up from his seat.

He got up so quickly that he almost tripped over the sleeves of his school uniform on the ground.Bi Ziyun didn't have time to pick up her school uniform, so she just supported the back of her chair and hurriedly strode towards the door.

When they walked to the door, the little dinosaur on the doorknob was still shaking back and forth in mid-air, but there was no one outside the door.

Standing in the corridor, Bi Ziyun felt her heart beating violently, as if it was about to pop out of her chest.

That dark blue school uniform, that slender and tall figure, and that familiar feeling...

"Fang Nan?"

His voice trembled imperceptibly: "Fang Nan, is that you?"

Bi Ziyun walked around in the corridor like a headless chicken, and then ran towards the stairs at the other end of the corridor.He clearly heard a rush of footsteps just now, that person must have gone downstairs.

He grabbed the banister of the stairs and rushed down, the fourth floor, the third floor, the second floor

After searching the entire building, Bi Ziyun didn't find the figure that flashed past the door until he got out of the gate of Neighborhood Education, as if what he saw just now was just his illusion.

The remedial teacher took the elevator down from the fifth floor and saw Bi Ziyun standing alone at the door of the building.He stared absently at the people passing by on the opposite sidewalk, looking a little helpless.

"Bi Ziyun, what happened?" the teacher asked him, "Why did you run down without saying a word?"

"I'm sorry, teacher."

Bi Ziyun slowly withdrew her gaze: "I just identified the wrong person, and I'm fine now."

He threw the empty stick of the lollipop into the trash can on the side of the road, turned around and followed the remedial teacher into the building.

The person at the door just now...could it be Fang Nan?

After returning to his seat, Bi Ziyun calmed down and thought about it, but felt that it was impossible.

He never mentioned to anyone where he was tutoring, let alone Fang Nan.Besides, it's already so late now, and the dormitory has already passed the door control, how could Fang Nan know that he is here to make up lessons, and suddenly came here to look for it?

It must be because of the Queen Mother's scolding today, which made me hallucinate.

Looking at the little dinosaur still dangling at the door, he suddenly felt that he couldn't tell what it was like.

After making up lessons, Bi Ziyun said goodbye to the teacher, put on her schoolbag and prepared to leave the building of Neighborhood Education.

When going out, Bi Ziyun weighed his schoolbag, feeling that the schoolbag seemed a little heavier than when he came.

But after two hours of class, he was so sleepy that he didn't bother to open his schoolbag.

Back at the boarding teacher's house, Bi Ziyun lay on the bed, took out his iPhone 5 from his pocket, and prepared to play some games before going to bed.

As soon as I got out of the classroom today, Uncle Huai Mingming and they all sent messages to comfort themselves, and even created a QQ group called "Crowdfunding to buy books for Brother Yun", took photos in the group and uploaded the review written for the Queen Mother in the office.

Originally, he was really in a low mood, but after being messed around by these guys, he didn't want to care about what happened in the evening self-study anymore.After all, being caught and scolded by the Queen Mother is not once or twice, everyone has long been used to it.

The only thing that made him feel that something was missing in his heart was that among all these people, only Fang Nan was missing.

Bi Ziyun flipped through the phone aimlessly, and simply clicked on the Qzone, wanting to post some thoughts about the day before going to bed.

In fact, he closed Qzone very early, and only used it as a memo to record his daily life from time to time.Usually no one came in to see it, and he didn't even set up permission issues.