In particular, the member of Team E behind Su Qingyun clearly saw Su Qingyun's series of actions. He first finished the last question directly, then turned to the front and finished all the questions within an hour.
He was almost questioning his life.
The member of the E country team looked at the last blank question on his test paper. He had been thinking about it for a full twenty minutes, but still had no idea.
He remembered that the person before him had only spent ten minutes on the problem, finishing it in a flash. He really doubted whether they were really working on the same problem. What kind of monster was this person before him?
The minute hand of the clock has turned almost three times, and the exam is nearing its end, but only a few people have finished the test paper. The vast majority of people looked at the last question and thought about it for a long time, but still felt helpless, had no ideas, and could not put pen to paper.
The contestants, who had finally breathed a sigh of relief after finishing the previous questions, turned pale and their hearts, which had just been relieved, were lifted up again. They had not expected that the difficulty of the last question would be so high. It was completely different from the previous questions and could not be compared at all.
What should I do? What should I do? Many people frowned, their hearts aching with anxiety. The atmosphere in the exam room was so tense that it was almost stagnant. Except for... Su Qingyun, who was still asleep. Her leisurely demeanor was completely out of place in this exam room.
After thinking for a long time, someone finally began to write with difficulty, but his writing was also intermittent, which was obviously not easy. Most people still left the last question blank.
Seeing that the exam time was about to end, many people gritted their teeth and forced themselves to write down some ideas, thinking that any score they could get would be a good score.
"Ring, ring, ring..." The bell for the end of the exam finally rang, and many of the participating teams actually reacted with relief.
The feeling of seeing time running out and being unable to do anything is simply torture. The end of the exam time is actually a relief for them.
The difficulty of the last question was beyond many people's imagination. When they walked out of the examination room, everyone's faces were filled with frustration.
Su Qingyun slept quite comfortably. When he stood up, he even yawned, which made many people glare at him.
Su Qingyun walked out of the examination room. Li Siyuan was in the examination room next to her. Li Siyuan's face was a little pale. When he saw Su Qingyun, his eyes brightened slightly and he immediately walked over and opened his mouth to speak.
"You want to ask one last question, right?" Su Qingyun said directly.
"Yes." Li Siyuan's face looked unhappy. He thought about the last question for a long time before he started writing. In the end, he wrote it with gritted teeth. After he finished, he was not sure whether he had done it correctly or not.
When he saw Su Qingyun's relaxed expression as she walked out of the examination room, he knew that she must have solved the problem.
"How should I do the last question?" Li Siyuan licked his dry lips, his throat tight and his heart pounding.
Su Qingyun thought for a moment and said, "Two key points."
"What is it?" Li Siyuan asked impatiently.
"First, the Vieta theorem, and second, the law of infinite decrease." Su Qingyun held up two fingers. "The sum of these two is the Vieta jump."
"Veda jump." Li Siyuan murmured the term again, as if thinking about something.
"Yes." Su Qingyun nodded. They were not fools to be able to participate in this competition. He just needed to give enough hints.
The standard Vieta jump is usually divided into three steps: 1. Assume that the equation has a solution and let x be the smallest solution; 2. Use Vieta's theorem to deduce a smaller solution y from x. 3. This contradicts the minimality of x, so the equation has no solution.
The last question of this test can be solved using the Vedic jump, which later became a very famous method in solving Mathematical Olympiads.
Li Siyuan had fallen into self-reflection and blocked out other people. Su Qingyun did not say anything else. She stood outside and saw Chen Ru, Mu Qiu and others coming out. Their faces all looked ugly.
"How is it?" Su Qingyun asked them.
Chen Ru said with a bitter face, "Not very good."
"I couldn't solve the last question." Mu Qiu said in a low voice.
"Is everything okay ahead?" Although he had confidence in everyone, Su Qingyun still asked.
"Not bad, no problem." They both nodded.
"It's okay." Su Qingyun comforted them, "We didn't make it, and no one else did either. It's almost the same."
This is indeed the case. Chen Ru and Mu Qiu nodded. Their expressions were not very good when they looked at the contestants from other countries.
"We?" Chen Ru asked Su Qingyun, somewhat unconvinced. "Qingyun, didn't you do it either?"
"...It's done." Su Qingyun touched his nose.
"..." Chen Ru sighed softly and said that if Qingyun couldn't solve the problem, he really didn't know how many other people in this competition could solve it.
Fortunately, Qingyun succeeded, and they felt a little better, at least someone in their team succeeded.
As they were talking, Chen Zheyu also came over with the same look of surprise on his face.
He looked at them a little tiredly and asked, "How is it?"
"We all failed the last question." Chen Ru pointed at himself and Mu Qiu, "But Qingyun solved it."
Chen Zheyu nodded, not showing much surprise on his face. It was pretty much what he expected. To be honest, the difficulty of the last question was beyond his imagination. He had just heard many contestants complaining about it. He was actually a little surprised that Qingyun could solve it.
Thinking of this, Chen Zheyu smiled bitterly. In the end, their team still had to rely on Qingyun, the youngest, to raise the average score.
"Go downstairs first, the team leader is still waiting downstairs."
"good."
The five of them walked out of the examination room. An anxious Yu Qi was waiting for them. When he saw them, he rushed over and asked eagerly, "I just heard from the other team members that the last question was very difficult. How did you do?"
While he was waiting downstairs, he had already heard the discussions of the players from other countries, and he felt a little panicked.
Chen Zheyu was the oldest, and he told the situation truthfully.
Yu Qi was stunned and stood there in shock. What kind of question could stump so many people?
"Qingyun did it?" He quickly grasped the key point.
"Yeah." Su Qingyun nodded.
Yu Qi felt a little relieved. He thought that if he could save one, it would be a good save. "What is the topic? Tell me."
"Suppose positive integers a and b satisfy ab+1 can divide a2+b2..." Su Qingyun recited the question word for word.
Yu Qi quickly took out a pen and paper and wrote down the question. He frowned and looked at the question for five minutes, but still had no clue.
Continue read on readnovelmtl.com
