There was no perfect score in the CMO finals, and there has never been a perfect score since the start of the competition, and all students were awarded according to the ratio of 3:2:1. Due to the difficulty of the questions and the large score value, there are only a dozen questions, and there are many people with the same score in the end, but there is never a full score in the finals!

But there was an accident on the day of grading.

On July 19, the two exams were completed, and a visit was organized immediately in the afternoon of the same day.

On July 20, the Olympiad experts reviewed the test papers, and all the contestants and their escorts continued to visit the capital and wait for the scores.

In the stages of unification, the standard questions that should have been repeatedly verified were found to be wrong in one paper. There were a few papers in front of the paper that also had the same correct answers, but all of them were crossed out by the graders, and no one noticed that the standard answers were wrong.

But there is a student here who has almost a perfect score, and the ability paper and the foundation paper are only short of this question, and this question is still an absolutely simple second question......

"I said Lao Xiang, the answer to this question is wrong, right?"

Because of the strange phenomenon of the paper, the marking teacher re-verified the answer and found that the standard answer was really wrong. The unified score has begun, but the test papers changed earlier have changed the wrong scores, and the marking team had better change it back before the oolong is not a big problem, otherwise there will be no turning back once the scores are announced.

"What's the question?" The expert teacher who was asked buried his head in the score, but only responded, without looking up.

As long as the scores of the basic paper and the thinking paper are added and the final process is completed as soon as possible, this year's gold, silver and bronze medals in the Olympiad will be settled. This old Xu is purely looking for trouble. How can the question be wrong, so many teachers verified the answers before printing, and it is almost impossible for such a small probability event to be wrong.

"Basic paper, second question, the answer should be 15.88 and 15.94."

"Have you done the math?"

"I'll tell you if I haven't checked it, you don't know what I'm doing - everyone stops, there is a problem with the test paper in front!"

"Don't worry, I'll do the math..."

[2. There is an average of 34 even numbers, and if one decimal place is retained, the number is 15.9, and if two decimal places are retained, the number is ____15.88____.] He took the test paper in his hand, and the number was 15.88, and the answer was 15.88. Check it with 15.94 again, and get 542 after rounding up and taking the even.

Hey, there's a second answer!

"But that's not right, I only got an answer when I counted it last time." He suddenly became suspicious, and read it again after careful consideration, but still didn't find a problem. He then ordered:

"Everyone, stop and help me see what's wrong with this question."

There are a total of four expert teachers in the primary school group, and the number of students in the marking group seems to be very small. In fact, for more than 200 papers with only fill-in-the-blank questions and no application questions, four marking teachers are enough to cope.

The marking teacher named Lao Xiang was obviously the group leader, and everyone stopped as soon as he spoke, and the other two teachers also began to check the question. However, the calculated answers are always different from the standard answers.

Lao Xiang, who couldn't find anything wrong, touched his head.

"Wrong, wrong, two words are missing here!" After a long time, one of the teachers pointed out.

The expert group grader looked at the place he pointed to, [The lowest number is ________. The piece of paper he was holding was the original title that had just been turned out......

Oh my God, the printed version is two words less than the original!

"The word 'minimum' is missing." The skin on the leader's forehead wrinkled into Jiang, and his brows furrowed into Chuan.

"This mistake is a bit big, what should I do now?"

They stop all the work they are doing, you look at me, I look at you, no one can make up their minds. Although they are not in charge of printing, it is difficult to say that there will be any joint and several liability, and it is not a good idea to shift the blame to other departments. Everyone has no grudges against each other, and this kind of thing is still good for peace.

"Don't promote the original question, there is nothing wrong with this question now, it's just that there are fewer students who dare to write two answers at the same time. Since the question is correct, it should be scored according to the correct answer, and the students who dare not write two answers are students who do not believe in themselves, and the purpose of this question is changed to 'the one who dares to eat crabs'......" The group leader began to refine the mistake.

The difficulty coefficient of each question, what to test, and what the score is, all aspects must be carefully considered before the test paper can be put on the test paper.

In fact, the lack of two words does not make a big difference to the difficulty of the whole question, and it can still be calculated with two answers in double the time. It's just that most of the other questions have only one answer, and many students who calculate two answers are afraid to start. In other words, the question not only requires careful calculation, but also requires students to dare to break the rules, and only "bold and careful" students can get this question right.

The expert group said everything in a unified and good tone, and suddenly felt that the depression in the room was much lighter. One by one, they began to take out the folded test papers again, and specially picked out the second question for change.

"Lao Xu, if you really have you, this kind of mistake can be found."

Change the cross to a tick and the tick to a cross, who will notice the wrong question? This re-revision did not require much attention, and the rewriting team chatted leisurely.

"Yes, thanks to you, how did you find out?"

"Hehe-he-" The teacher named Lao Xu smiled mysteriously and took out two test papers stacked on top of each other, "It's all up to this student." ”

"Riki?" The teacher fixed his eyes on the name.

"Yes, the total of his AB papers is 8 points out of a full score, isn't 8 points the question with the minimum score? I got a perfect score on the thinking ability test, and I wanted to see what made him fall for it. The result is a look - "The unprecedented full-score final test paper was changed from his own hands, and Lao Xu, who had broken the record, smiled proudly:

"It turned out to be - hahaha, we planted it."

"Full marks for B-roll?"

"Wait!" The leader of the old team reacted quickly. Full marks in Paper B, only 8 points short of the title in Paper A, isn't it after changing it back now-

"Isn't that student named Riki full of AB papers now?!"

"This, this—"

"It can't be a coincidence, right?"

"Let me see, ......" had the same question as the other teachers, and the group leader turned up the entry materials of the primary school group. One inch bareheaded photo, student details and results from the previous two exams on the materials:

"The preliminary round and the semi-final were on the base with full marks, and ...... I'm only 10 years old this year!? ”

"Ten years old is already in the fifth grade?" Lao Xu hadn't read Limu's information.

"What a seedling, a good seedling."

As the teachers entered the final stage of unification, the teachers also relaxed, and the office that was supposed to be a lot became noisy...... The working group in another office on the first floor finished correcting the test papers, and several teachers walked outside with a stack of test papers, and the four people in the room were talking about something sparsely.

"What a good seedling, what a good seedling, haven't you finished changing it?" When I came in, I heard them chatting.

"How can you be fast, the winter children have been selected?"

The number of students participating in the Olympiad in primary school is the largest, and the older they get, the more desperate they become about the Olympiad. There are only more than 100 participants in the junior high school group and the high school group, and the average number of test papers that the teachers in the marking group are responsible for is not even 50, so the speed of paper correction is naturally faster than that of the primary school group.

In addition to the domestic awards, the CMO of the national competition also has an important function, that is, to select students who participate in the international competition IMO. Students who want to participate in the International Mathematics Olympiad cannot register on their own, and the winter camp is a place for training for national Olympiad players.

"Elected, what about yours?" The junior high school teacher asked rhetorically.

"One has been chosen." The group leader naturally refers to the pear wood who has two perfect scores.

"It should be two, I have a second full-score test paper here...... "Lao Xu is a proud one."

******

From Tsinghua University to Peking University...... Of course, this is just a tour.

In order to motivate the university life in the next four years, he spent a little money to take the train to Yanjing with four classmates, just to visit the two schools of Tsinghua University and Peking University.

If the family had money at that time, I could provide him with a taste of the learning atmosphere here before the college entrance examination, and I am afraid that he would really be able to step into half a foot and transfer to the Department of Philosophy, the Department of Education, the Department of Psychology or something.

Although the CMO is suspected of "high fees and fake tourism", it is indeed promoting inspirational education for students. They take students to experience the campus culture of Tsinghua University and Peking University, not pure tourism.

The itinerary starts from the library to Boya Tower, Weiming Lake, Centennial Lecture Hall, and the Revitalization of China Monument...... Students who do not go home during the holidays talk and laugh on campus, and the relaxed environment immediately makes students have a kind of "I want to go to Peking University".

This time I came to Zhengzhi in summer, the campus scenery of Peking University is beautiful, the roadside is full of tree shadows, and an ancient tower stands among the trees, giving people a feeling of an ancient garden, and the unnamed lake is rippling and sparkling. All kinds of scenery and trees are integrated with the lake.

More than 200 students lined up in Haohao soup, walked to the hearty place, and sat down in all directions, which was also extremely spectacular. Students from each region sit together in small groups. In any case, the partners who have lived together for five days are closer than the other strange students.

"Don't be so stingy, you can't die on the topic." Yesterday, the exam was over, and there were still students in the Yanjing team who wanted to answer the right questions.

"It is said that the questions are forgotten as soon as they come out of the exam room, how can I remember what was tested in which question, and I can't remember the answers!" Said his friend who was also in the Yanjing team.

It's not that this friend is stingy, it's just that he happens to be the type who can remember all the topics when he is studying and leave all the questions behind when he is resting.

"If I believe you, I'll be two hundred and five." The student who couldn't understand this mode of thinking was annoyed and frustrated, crying and drooping his shoulders, "It's over, you must be the first prize, and you have to be in the winter camp, I'm only the third prize......"

"I told you not to go around with others to answer questions! How do you know if they're right or wrong? ”

"You won't answer with me......" He trusted his friend's strength, but unfortunately he couldn't get the right answer from him, and asked instead: "Who do you think will win the championship this time?" ”

"I can't say that clearly, but the little man over there must have little hope."

Not far away, a little bean Ding was walking with a bag of garbage, and his height was in stark contrast to the girl next to him who was rushing to help with the garbage. Undergraders? It's rare, and it doesn't look like it's in the fourth grade!

After a while, the two walked to the trash can area, and when they passed by the Yanjing team, the student who answered stood up, patted him on the shoulder and said-

"Don't worry, you're still young, keep up the good work!"

Leng Buding was patted on the shoulder, and asked himself to "keep up the good work", Limu only felt inexplicable for a while. He replied, "...... Oh. ”

In view of the fact that you can leave freely after 12 o'clock tomorrow as long as you apply, Limu asked Mo Moxin to book a ticket for her mother that night, and she could go to the Great Wall after a rest. At the same time, considering that Lu Hui had never been to Yanjing, he made a phone call to ask, but Lu Wei and Li Xishu were also on the phone, and the surname Suo asked them to have a good time together.

After that, I called Teacher Li again, hoping to book a ticket for her to come to the ceremony tomorrow. But Mr. Li refused on the excuse of crossing the Great Wall and lack of physical strength, but he was actually helping Limu save money, saying that as long as Limu could bring back a first prize, he would be satisfied-

That night, the women's group led by Mo Moxin came to take Yanjing to rest for a night.